Top 10 PMMA Microsphere Manufacturers Serving France in 2026

PMMA Microsphere Market Overview Serving France

Poly(methyl methacrylate) microspheres, commonly called PMMA microspheres, acrylic microspheres, PMMA beads or PMMA spherical particles, are precision polymer particles manufactured from methyl methacrylate-based materials.

Depending on the manufacturing method, PMMA particles may be supplied as:

• Monodisperse microspheres;

• Broad-distribution microspheres;

• Nano-sized PMMA particles;

• Micrometre-sized PMMA beads;

• Crosslinked PMMA microspheres;

• Porous PMMA particles;

• Functionalized PMMA beads;

• Fluorescent PMMA microspheres;

• Colored PMMA microspheres;

• Metal-coated PMMA particles;

• Dry powders;

• Aqueous suspensions.

PMMA microspheres are used across a wide range of technical applications, including:

• Particle-size calibration;

• Flow cytometry;

• Optical calibration;

• Microfluidics;

• Biomedical research;

• Diagnostic assay development;

• Biosensors;

• Coatings;

• Paints and inks;

• Light diffusion;

• Polymer modification;

• Composite materials;

• Spacer applications;

• Porous-material fabrication;

• Sacrificial templates;

• Chromatography research;

• Microplastic reference standards.

Current market reports identify companies such as Cospheric, Matsumoto Yushi-Seiyaku, Phosphorex, Polysciences, Sekisui Kasei, Bangs Laboratories and microParticles among established participants in the global PMMA microsphere market.

For French customers, however, a manufacturer ranking should consider more than global market visibility.

Important purchasing factors include:

• EU availability;

• Particle-size range;

• Monodispersity;

• Surface functionality;

• Powder or suspension format;

• Optical properties;

• Solvent resistance;

• Custom manufacturing;

• Quality documentation;

• REACH requirements;

• Commercial supply continuity.

This guide compares ten PMMA microsphere manufacturers and specialist suppliers relevant to customers serving France in 2026:

1. microParticles GmbH;

2. SANYU;

3. Cospheric;

4. Sekisui Kasei;

5. Matsumoto Yushi-Seiyaku;

6. Polysciences;

7. Bangs Laboratories;

8. Magsphere;

9. Lab261;

10. Phosphorex.

SANYU is the only China-based manufacturer included in this ranking.

The ranking is an editorial comparison based on publicly available product information, particle technologies, customization capability, application breadth, current product availability and relevance to French and European buyers.

It is not based on audited French revenue, verified market share or independent head-to-head laboratory testing.

Quick Answer: Leading PMMA Microsphere Manufacturers

The leading PMMA microsphere manufacturers and specialist suppliers serving France in 2026 include microParticles GmbH, SANYU, Cospheric, Sekisui Kasei, Matsumoto Yushi-Seiyaku, Polysciences, Bangs Laboratories, Magsphere, Lab261 and Phosphorex.

microParticles GmbH ranks first because it combines European manufacturing with a particularly broad PMMA platform covering non-functionalized, functionalized and fluorescent particles. The company lists PMMA diameters from approximately 100 nm to 1000 μm with typical monodispersity of CV below 5%.

SANYU ranks second because it provides a broad portfolio of regular, crosslinked and carboxyl-functionalized PMMA microspheres in powder and suspension formats, together with flexible packaging and OEM customization.

Cospheric ranks third because it offers one of the broadest precision PMMA size ranges, including particles from approximately 1 μm to 3.5 mm, as well as conductive silver-coated PMMA spheres.

The best supplier depends on the actual application.

A PMMA microsphere that performs well as an optical spacer may not be ideal for bioassay development, particle calibration or solvent-resistant coatings.

What Are PMMA Microspheres?

PMMA is the abbreviation for poly(methyl methacrylate), a transparent thermoplastic polymer manufactured from methyl methacrylate.

When PMMA is produced as controlled spherical particles, the resulting microspheres can provide:

• Smooth spherical morphology;

• Predictable density;

• Controlled refractive index;

• Narrow particle-size distribution;

• Good optical clarity;

• Mechanical stability;

• Tunable surface chemistry.

Typical PMMA density is approximately 1.18–1.20 g/cm³, while the refractive index is approximately 1.48–1.49 for many commercial particle systems. microParticles GmbH publicly lists a density of 1.19 g/cm³ and refractive index of 1.48 for its PMMA platform, while Sekisui lists approximately 1.2 g/cm³ density and 1.49 refractive index for its MB-series PMMA particles.

These properties make PMMA useful when a project requires a polymer particle with physical characteristics different from polystyrene or silica.

Why Use PMMA Instead of Polystyrene or Silica?

PMMA, polystyrene and silica microspheres all have useful properties, but they are not interchangeable.

PMMA vs Polystyrene

PMMA generally has a higher density and lower refractive index than polystyrene.

Polysciences reports approximately 1.19 g/cc density for its PMMA microspheres and notes that PMMA is less hydrophobic than polystyrene, which may reduce nonspecific protein and peptide binding in some applications.

This can make PMMA attractive for:

• Bioassay development;

• Reference particles;

• Centrifugation-based separation;

• Optical model systems;

• Applications where excessive nonspecific adsorption is undesirable.

PMMA vs Silica

Silica is denser and more inorganic in character.

microParticles GmbH lists approximately:

• PMMA density: 1.19 g/cm³;

• PMMA refractive index: 1.48;

• Silica density: 2.00 g/cm³;

• Silica refractive index: 1.42.

PMMA may therefore be preferred when:

• Lower particle density is needed;

• Polymer processing is required;

• A deformable or organic particle is preferred;

• Optical matching with polymer systems is important.

Silica may be preferred where:

• Higher density is beneficial;

• Higher temperature resistance is required;

• An inorganic silanol surface is needed.

How We Selected the Top 10 Manufacturers

The ranking was developed using criteria relevant to French research, medical-technology and industrial buyers.

Genuine PMMA Product Availability

Priority was given to manufacturers that currently document PMMA microspheres or PMMA particle manufacturing.

Particle-Size Range

A broad diameter portfolio allows customers to use one supplier across:

• Nano-scale particles;

• Fine microspheres;

• Standard micrometre particles;

• Large spacer beads.

Monodispersity

Important parameters include:

• Mean diameter;

• Standard deviation;

• Coefficient of variation;

• D10;

• D50;

• D90.

Highly monodisperse particles are particularly important for:

• Calibration;

• Optical studies;

• Microfluidics;

• Flow cytometry;

• Model systems.

Functionalization

Additional value was assigned to suppliers offering:

• Carboxyl groups;

• Amino groups;

• Streptavidin;

• Fluorescent labeling;

• Color labeling;

• Metal coatings;

• Custom chemistry.

Product Format

Customers may require:

• Dry powder;

• Aqueous suspension;

• High-solids suspension;

• Custom concentration.

Commercial Supply

The ranking also considered:

• Sample quantities;

• Bulk quantities;

• OEM support;

• Custom manufacturing;

• Batch consistency;

• Quality documentation;

• Long-term supply.

France and EU Relevance

EU-based manufacturers may simplify:

• Intra-EU logistics;

• Lead time;

• Supplier audits;

• Regulatory communication;

• REACH documentation.

Non-EU suppliers remain important where they offer a broader size range, lower cost or specialized customization.

Quick Comparison of the Top 10 Manufacturers

1. microParticles GmbH

microParticles GmbH is a Germany-based specialist in monodisperse nano- and microspheres.

For French customers, its location inside the European Union is an important advantage for logistics and technical collaboration.

The company's PMMA portfolio includes:

• Non-functionalized PMMA particles;

• Functionalized PMMA particles;

• Fluorescent PMMA particles;

• Custom PMMA microspheres.

microParticles publicly lists PMMA diameters from approximately 100 nm to 1000 μm with typical monodispersity below CV 5%.

Functionalized PMMA

The company offers PMMA surfaces including:

• Carboxyl;

• Amino;

• Streptavidin;

• Custom functional groups.

Its activated PMMA particles are positioned for diagnostic and biomedical research, with COOH and NH₂ options and published carboxyl densities ranging from approximately 10 to 100 μmol/g depending on particle size.

Fluorescent PMMA

microParticles also offers fluorescent PMMA microspheres for:

• Confocal imaging;

• Microfluidics;

• Fluorescence calibration;

• Colloid studies;

• Optical materials.

Key Strengths

• EU-based manufacturing;

• PMMA-specific product platform;

• 100 nm–1000 μm size range;

• High monodispersity;

• Functionalized PMMA;

• Fluorescent PMMA;

• Custom particle development.

Best Suited For

microParticles GmbH is particularly suitable for French:

• Universities;

• Diagnostic R&D;

• Flow and optical laboratories;

• Microfluidic developers;

• Calibration laboratories;

• Biomedical researchers;

• Customers prioritizing EU sourcing.

2. SANYU

SANYU manufactures functional microspheres, magnetic beads and chromatography materials for biotechnology, diagnostics, research and industrial applications.

SANYU is the only China-based manufacturer included in this ranking. Other Chinese PMMA microsphere suppliers have been excluded.

The company's PMMA portfolio includes:

• Standard PMMA microspheres;

• Monodisperse PMMA particles;

• Crosslinked PMMA microspheres;

• Carboxyl PMMA microspheres;

• Powder formats;

• Aqueous suspension formats.

Standard PMMA Microspheres

SANYU offers PMMA particles in multiple sizes.

Examples currently listed include:

• 2 μm PMMA microspheres;

• 10 μm PMMA microspheres;

• 50 μm PMMA microspheres;

• 100 μm PMMA microspheres;

• 200 μm PMMA microspheres.

The 2 μm and 10 μm products are available as dry PMMA powder for applications including optical materials, coatings, polymer modification and composite materials.

Suspension PMMA Microspheres

SANYU also offers selected PMMA microspheres in aqueous suspension.

Its 10 μm PMMA latex product is supplied at 10% solids in deionized water and is positioned for calibration, optical materials, particle analysis and coatings.

Crosslinked PMMA Microspheres

Crosslinked PMMA improves:

• Solvent resistance;

• Mechanical strength;

• Dimensional stability;

• Structural durability.

SANYU offers crosslinked PMMA across multiple sizes, including 3 μm, 10 μm, 100 μm and larger particle formats.

Potential applications include:

• Porogens;

• Sacrificial templates;

• Composite fillers;

• Separation research;

• Chromatography research;

• Advanced polymer materials.

Carboxyl PMMA Microspheres

SANYU also supplies surface-functionalized PMMA.

For example, its 100 μm carboxyl PMMA microspheres are supplied as a 5% aqueous suspension and provide reactive COOH groups for EDC/NHS immobilization of antibodies, proteins, peptides and other biomolecules.

Customization

Potential customization includes:

• Particle size;

• Particle-size distribution;

• Crosslinking;

• Surface carboxyl groups;

• Solids concentration;

• Powder or suspension format;

• Packaging;

• OEM supply.

Key Strengths

• Broad PMMA particle-size portfolio;

• Dry powder and suspension options;

• Crosslinked PMMA;

• Carboxyl-functionalized PMMA;

• Bulk packaging;

• OEM customization;

• Factory-direct supply.

Best Suited For

SANYU may be particularly relevant to French:

• Polymer developers;

• Coating formulators;

• Optical material companies;

• Diagnostic R&D teams;

• Biotechnology laboratories;

• Composite manufacturers;

• Customers requiring custom particle sizes;

• Projects requiring larger commercial quantities.

Considerations for French Buyers

As a non-EU manufacturer, procurement teams should confirm:

• Incoterms;

• Importer responsibility;

• EU REACH information;

• Country of origin;

• Customs documentation;

• Lead time;

• Commercial safety stock;

• Change-control procedures.

3. Cospheric

Cospheric is a US supplier specializing in precision spherical particles.

Its PMMA portfolio is one of the broadest available in terms of particle diameter.

Cospheric currently offers uncoated PMMA spheres from approximately 1 μm to 3.5 mm.

PMMA Properties

Cospheric positions PMMA microspheres for:

• Life sciences;

• Medical technology;

• MEMS;

• Optics;

• High-performance composites;

• Spacers;

• Fillers;

• Reference particles.

Metal-Coated PMMA

Cospheric also supplies conductive silver-coated PMMA particles in approximately 5–700 μm formats.

These combine:

• A relatively lightweight PMMA core;

• Conductive metallic coating;

• Controlled spherical geometry.

Key Strengths

• Extremely broad diameter portfolio;

• Precision size grades;

• Dry-powder formats;

• Metal-coated options;

• Optical and engineering applications;

• Strong reference-particle positioning.

Best Suited For

Cospheric is particularly relevant to French:

• Aerospace research;

• Optical laboratories;

• Microfluidics;

• MEMS developers;

• Composite-material research;

• Calibration applications;

• Spacer applications.

4. Sekisui Kasei

Sekisui Kasei manufactures TECHPOLYMER spherical polymer particles.

The platform includes several PMMA technologies:

• Standard PMMA;

• Crosslinked PMMA;

• Monodisperse PMMA;

• Porous PMMA;

• Cosmetic PMMA;

• PMMA-based copolymer particles.

MB Series

The MB Series consists of spherical polymethyl methacrylate particles supplied as powder.

Sekisui lists approximately:

• Density: 1.2 g/cm³;

• Refractive index: 1.49.

Applications include:

• Displays;

• Paints;

• Inks;

• Cosmetics;

• Other industrial systems.

Crosslinked PMMA

Where solvent resistance is important, Sekisui offers MBX crosslinked PMMA particles.

Particle Engineering

TECHPOLYMER can be customized for:

• Particle diameter;

• Size distribution;

• Shape;

• Porosity;

• Refractive index;

• Hardness;

• Solvent resistance;

• Heat resistance.

Key Strengths

• Strong industrial polymer engineering;

• Standard and crosslinked PMMA;

• Porous particles;

• Optical expertise;

• Custom physical properties;

• Large corporate manufacturing base.

Best Suited For

Sekisui Kasei is especially relevant to:

• Optical films;

• Display materials;

• Paints;

• Industrial coatings;

• High-performance polymer formulations;

• Specialty cosmetic development where legally applicable.

5. Matsumoto Yushi-Seiyaku

Matsumoto Yushi-Seiyaku manufactures Matsumoto Microsphere M-series polymer particles.

The M-series consists of PMMA ultra-fine spherical particles available as both crosslinked and non-crosslinked materials.

Particle Shape Options

In addition to conventional spherical particles, Matsumoto reports grades with:

• Oval structures;

• Elliptical bowl-like structures;

• Partially hollow interiors.

These structures can increase water or oil absorption.

Crosslinked Products

Crosslinked M-series particles provide greater solvent resistance than non-crosslinked PMMA.

Key Strengths

• PMMA manufacturing experience;

• Crosslinked and non-crosslinked grades;

• Shape control;

• Hollow and partially hollow structures;

• Absorption properties;

• Industrial additive expertise.

Best Suited For

Matsumoto products may be relevant to French:

• Coating formulators;

• Industrial chemical companies;

• Advanced polymer developers;

• Surface-texture applications;

• Porous-material research.

6. Polysciences

Polysciences supplies both monodisperse and broad-distribution PMMA microspheres.

Its standard monodisperse PMMA product has a nominal diameter of 0.30 μm and is supplied as a 2.5% solids suspension.

The company also supplies broad-distribution PMMA particles in the 1–10 μm range as aqueous suspension or dry material.

Biological Advantages

Polysciences notes that PMMA is less hydrophobic than polystyrene and may therefore show reduced nonspecific binding of proteins and peptides.

It also notes PMMA's higher density relative to polystyrene, which can make concentration by centrifugation easier.

Key Strengths

• Convenient research quantities;

• Monodisperse PMMA;

• Broad-distribution PMMA;

• Life-science positioning;

• Surface carboxyl groups on selected products;

• Established documentation.

Best Suited For

Polysciences is particularly useful for:

• Bioassay feasibility;

• Life-science research;

• Centrifugation studies;

• General particle research;

• Early-stage product development.

7. Bangs Laboratories

Bangs Laboratories manufactures polymer microspheres for diagnostics, bioseparation and analytical applications.

The company confirms that its PMMA microspheres are solid, nonporous polymer beads.

Its published polymer microsphere information describes PMMA particles as usable:

• As standards;

• As markers;

• For passive protein coating;

• In diagnostic tests and assays.

Bangs has historically offered polymer bead sizes spanning approximately tens of nanometres to tens of micrometres, depending on product family.

Key Strengths

• Diagnostic particle expertise;

• PMMA and polystyrene knowledge;

• Custom particle development;

• Assay-development support;

• Calibration and quality-control experience.

Best Suited For

Bangs Laboratories is particularly relevant to French:

• Diagnostic R&D;

• Analytical instrument manufacturers;

• Calibration laboratories;

• Life-science research;

• Customized bead projects.

8. Magsphere

Magsphere manufactures PMMA latex particles in aqueous suspension.

Its current PMMA catalog includes diameters ranging from approximately 0.1 μm to 40 μm.

Standard specifications include:

• 10% w/v aqueous suspension;

• Diameter tolerance within approximately 10% of the catalog specification;

• 5 mL, 15 mL and 100 mL package options;

• Bulk pricing for larger quantities.

Available Sizes

Examples include:

• 0.1 μm;

• 0.15 μm;

• 0.2 μm;

• 0.3 μm;

• 0.4 μm;

• 0.6 μm;

• 0.7 μm;

• 0.8 μm;

• 1 μm;

• 2 μm;

• 3 μm;

• 10 μm;

• 15 μm;

• 20 μm;

• 30 μm;

• 40 μm.

Applications

Magsphere specifically recommends PMMA and polystyrene particles as optical chromatography model systems because of their different refractive indices.

Key Strengths

• Broad aqueous PMMA catalog;

• Nano- and microscale sizes;

• Convenient small packages;

• Bulk supply;

• Custom particle capability;

• ISO 9001 manufacturing environment.

Best Suited For

Magsphere is particularly useful for:

• Laboratory research;

• Optical chromatography;

• Microfluidics;

• Particle transport;

• Calibration studies;

• Custom polymer-particle development.

9. Lab261

Lab261 is a US-based manufacturer of polymer micro- and nanoparticles and currently maintains a substantial PMMA catalog.

Its current PMMA platform includes sizes from approximately 15 nm to hundreds of micrometres, with:

• Plain surfaces;

• Carboxyl surfaces;

• Primary amine surfaces;

• Fluorescent formats;

• Colored formats;

• Surfactant-controlled products.

Analytical Applications

Lab261 positions PMMA microspheres for:

• ICP-MS calibration;

• ICP-TOFMS;

• Ultrasound particle detection;

• Biological assays;

• Reference materials;

• Microplastic research.

Fluorescent and Colored PMMA

The company also supplies color-dyed PMMA for diagnostic-device development and visual-marker applications.

Key Strengths

• Very broad PMMA size range;

• Surface functionality;

• Surfactant-free options;

• Reference-standard applications;

• Fluorescent and dyed PMMA;

• Batch-specific characterization.

Best Suited For

Lab261 is particularly relevant to French:

• Environmental laboratories;

• Microplastic researchers;

• Analytical chemistry laboratories;

• ICP-MS developers;

• Biomedical researchers;

• Advanced reference-material projects.

10. Phosphorex

Phosphorex has a long history in polymeric particle and microsphere development.

However, buyers should note an important 2026 commercial change.

Phosphorex states that its standard polystyrene, PMMA and PCL product lines have been discontinued. PMMA particles can still be supported through custom quantity orders subject to an agreed minimum quantity.

This is why Phosphorex appears lower in this 2026 ranking than on many older PMMA manufacturer lists.

Current PMMA Position

PMMA may still be relevant where customers require:

• Custom quantity production;

• Legacy product support;

• Specialized particle specifications;

• Contract development.

Key Strengths

• Polymer particle manufacturing experience;

• Custom microsphere capabilities;

• Process development;

• Scale-up expertise.

Important Limitation

French buyers looking for routine small catalog quantities should evaluate other manufacturers first because Phosphorex no longer maintains its former standard PMMA product line.

Best Manufacturers by Application

How to Choose PMMA Microspheres

1. Define the Application

Start by determining whether the particle will be used as:

• Calibration standard;

• Optical diffuser;

• Spacer;

• Polymer filler;

• Bioassay support;

• Fluorescent marker;

• Microfluidic model particle;

• Sacrificial template;

• Porogen;

• Reference microplastic;

• Composite filler.

The ideal PMMA particle depends heavily on the required function.

2. Select the Particle Diameter

Particle diameter can influence:

• Surface area;

• Optical scattering;

• Sedimentation;

• Flow behavior;

• Packing;

• Film texture;

• Coating appearance;

• Pore size;

• Calibration response.

Submicrometre particles may be useful for:

• Biological research;

• Fine optical systems;

• Colloidal studies.

Particles in the 1–20 μm range are common for:

• Calibration;

• Microfluidics;

• Optical systems;

• Coatings.

Larger particles may be selected for:

• Spacers;

• Porogens;

• Templates;

• Composite systems.

3. Evaluate Particle-Size Distribution

Do not compare products only by nominal diameter.

Ask for:

• Mean diameter;

• Standard deviation;

• CV;

• D10;

• D50;

• D90;

• Measurement method.

A 10 μm nominal PMMA particle with CV below 5% behaves very differently from a 1–10 μm broad-distribution powder.

4. Check the Measurement Method

Particle size may be measured using:

• Dynamic light scattering;

• Laser diffraction;

• Coulter counter;

• Optical microscopy;

• SEM;

• Image analysis.

Results from different measurement methods should not always be compared directly.

5. Select Powder or Suspension

Dry powder may be preferred for:

• Polymer compounding;

• Coatings;

• Composite fabrication;

• Porogen applications;

• High solids processing.

Aqueous suspension may be preferable for:

• Bioassays;

• Calibration;

• Particle counting;

• Flow studies;

• Microfluidics.

6. Compare PMMA Density

Typical PMMA microsphere density is approximately 1.18–1.20 g/cm³.

Density affects:

• Sedimentation;

• Centrifugation;

• Flow behavior;

• Suspension stability;

• Separation.

7. Compare Refractive Index

PMMA refractive index is commonly around 1.48–1.49.

This makes PMMA useful in:

• Optical model systems;

• Light-diffusing materials;

• Instrument calibration;

• Particle-imaging studies.

8. Evaluate Surface Chemistry

Available surface types may include:

• Plain;

• Sulfate;

• Carboxyl;

• Amino;

• Streptavidin;

• Custom groups.

Functionalization is particularly important for:

• Biosensors;

• Immunoassays;

• Protein immobilization;

• Diagnostic research.

9. Evaluate Solvent Resistance

Standard PMMA can swell or dissolve in certain organic solvents.

If the formulation contains aggressive solvents, consider:

• Crosslinked PMMA;

• Solvent-resistant grades;

• Alternative polymer matrices.

Sekisui Kasei and SANYU both offer crosslinked PMMA products intended to improve solvent resistance.

10. Test Multiple Lots

Commercial qualification should include several representative production lots.

Compare:

• Diameter;

• Size distribution;

• Sphericity;

• Solids concentration;

• Density;

• Optical response;

• Surface chemistry;

• Application performance.

Monodisperse vs Broad-Distribution PMMA Microspheres

Monodisperse PMMA

Monodisperse particles have a relatively narrow size distribution.

They are especially useful for:

• Calibration;

• Flow cytometry;

• Optical studies;

• Microfluidics;

• Reference materials;

• Colloidal research.

microParticles GmbH reports CV values below 5% for its standard PMMA particle platform.

Broad-Distribution PMMA

Broad-distribution materials may be more appropriate for:

• Fillers;

• Coatings;

• Polymer modification;

• General industrial processing.

Polysciences, for example, supplies 1–10 μm broad-distribution PMMA products.

The correct choice depends on whether precise particle-to-particle uniformity is functionally important.

Plain vs Functionalized vs Fluorescent PMMA Microspheres

Crosslinked vs Non-Crosslinked PMMA Microspheres

Standard PMMA is suitable for many optical, calibration and polymer applications.

Crosslinked PMMA creates a three-dimensional polymer network that may provide improved:

• Mechanical stability;

• Dimensional stability;

• Solvent resistance;

• Process durability.

Crosslinked PMMA can be useful for:

• Porogen applications;

• Composite processing;

• Aggressive solvent environments;

• Chromatography research;

• Sacrificial templates.

However, crosslinking can also alter:

• Swelling;

• Density;

• hardness;

• surface properties.

Always test the actual grade.

France and EU Procurement Considerations

EU Supplier vs Non-EU Supplier

For French buyers, sourcing from an EU manufacturer can simplify:

• Logistics;

• Customs handling;

• Supplier visits;

• REACH communication;

• Delivery time.

This is one reason microParticles GmbH is particularly relevant to French customers.

However, non-EU manufacturers may provide:

• Wider size ranges;

• Lower cost;

• Specialized products;

• Larger bulk packaging;

• More extensive customization.

Direct Manufacturer vs Distributor

Direct manufacturer relationships are generally preferable for:

• Custom particle sizes;

• Functionalized PMMA;

• Commercial scale-up;

• Quality agreements;

• Technical investigations;

• Change control.

Distributors can be useful for:

• Small research quantities;

• Local-language communication;

• Local invoicing;

• Faster stock delivery.

Importing from Outside the EU

French buyers sourcing from the United States, Japan or China should clarify:

• Incoterms;

• Importer-of-record responsibility;

• Customs classification;

• SDS requirements;

• REACH obligations;

• shipping costs;

• lead time.

EU REACH Microplastics Regulation and PMMA Microspheres

This is one of the most important issues for French PMMA microsphere buyers in 2026.

Commission Regulation (EU) 2023/2055 amended REACH Annex XVII to restrict synthetic polymer microparticles.

The rules began applying on 17 October 2023. They cover certain synthetic polymer particles below 5 mm that are organic, insoluble and resistant to degradation.

PMMA microspheres may meet this definition depending on their characteristics.

However, that does not mean that every PMMA microsphere use is automatically prohibited.

The Regulation contains:

• Derogations;

• Transitional periods;

• Industrial-use provisions;

• Instructions-for-use obligations;

• Reporting requirements.

Examples of uses that may qualify for derogation include particles that are permanently incorporated into a solid matrix or contained by technical means during end use, depending on the exact circumstances.

Industrial Use

Industrial-site use can be treated differently from consumer release.

French manufacturers using PMMA microspheres as:

• Polymer fillers;

• Composite additives;

• Coating components;

• Process materials

should determine which REACH provisions apply to their exact use.

2026 Reporting Requirements

ECHA states that reporting obligations under the microplastics restriction begin in either 2026 or 2027 depending on the actor and use.

For certain manufacturers and industrial downstream users handling synthetic polymer microparticles used as feedstock in plastic manufacturing, reporting started in 2026.

Reports are submitted annually by 31 May for estimated emissions during the previous calendar year.

ECHA confirmed that the first reports covering 2025 emissions were due by 31 May 2026 for the applicable category.

Cosmetics

EU Regulation 2023/2055 also includes transitional periods for certain cosmetic uses of synthetic polymer microparticles.

Therefore, French cosmetic formulators evaluating PMMA spherical powders should not rely only on old technical data or legacy formulations.

Regulatory suitability should be assessed for the exact:

• Particle;

• Product category;

• Intended use;

• Release profile;

• Transitional period.

Important Practical Recommendation

Before ordering a commercial quantity of PMMA microspheres for France, ask the supplier for:

• Polymer identification;

• Particle-size range;

• Solubility information;

• Degradability information where available;

• REACH statement;

• Synthetic Polymer Microparticle statement;

• Intended-use guidance.

The buyer should then review the specific use with its own EU regulatory specialist.

This article does not constitute legal or REACH compliance advice.

Documents to Request from a PMMA Microsphere Supplier

French customers should request documents appropriate to the application.

These may include:

• Product specification;

• Certificate of Analysis;

• Technical Data Sheet;

• Safety Data Sheet;

• Particle-size report;

• Particle-size distribution;

• Measurement method;

• Material composition;

• PMMA grade;

• Crosslinking information;

• Density;

• Refractive index;

• Sphericity;

• Solids concentration;

• Suspension-buffer composition;

• Surfactant information;

• Functional-group specification;

• Fluorescence data;

• Storage conditions;

• Shelf-life information;

• Country of origin;

• REACH statement;

• EU microplastics/SPM statement;

• Batch-traceability procedure;

• Change-control policy;

• Quality-management certificate;

• Complaint-handling procedure.

Recommended Supplier Qualification Process

Step 1: Define the Target PMMA Specification

Specify:

• Material;

• Particle size;

• Allowed size distribution;

• Crosslinked or non-crosslinked;

• Surface functionality;

• Powder or suspension;

• Solids concentration;

• Optical requirements;

• Annual volume.

Step 2: Screen Three to Five Suppliers

Select suppliers representing different strengths:

• EU manufacturer;

• Broad-range manufacturer;

• Precision particle specialist;

• Potential secondary source.

Step 3: Request Samples

Ensure samples are representative of future commercial manufacturing.

Step 4: Verify Particle Size

Measure the particles using your own:

• DLS;

• Coulter counter;

• Laser diffraction;

• Microscopy

where appropriate.

Step 5: Test Application Performance

For coatings, evaluate:

• Dispersion;

• Matting;

• Surface texture;

• Abrasion;

• Optical haze.

For calibration, evaluate:

• Mean diameter;

• CV;

• refractive properties;

• counting consistency.

For bioassays, evaluate:

• Nonspecific adsorption;

• Ligand coupling;

• background;

• signal-to-noise.

Step 6: Compare Multiple Lots

Do not approve a long-term supplier from a single lot.

Step 7: Evaluate Stability

Test:

• Storage stability;

• Suspension settling;

• Redispersibility;

• Temperature excursions;

• Solvent exposure.

Step 8: Review EU Regulatory Status

Determine whether the particle and intended use are affected by:

• REACH;

• Synthetic Polymer Microparticle restrictions;

• Relevant downstream-product regulations.

Step 9: Complete Commercial Qualification

Confirm:

• Price;

• MOQ;

• Standard batch;

• Annual capacity;

• Lead time;

• Safety stock;

• Packaging;

• Lot reservation.

Step 10: Establish Change Control

The supplier should notify customers before significant changes to:

• Polymer raw material;

• Polymerization process;

• Particle-size specification;

• Surface chemistry;

• Production site;

• Suspension formulation;

• Packaging.

Frequently Asked Questions

Who Are the Leading PMMA Microsphere Manufacturers Serving France?

Notable suppliers include microParticles GmbH, SANYU, Cospheric, Sekisui Kasei, Matsumoto Yushi-Seiyaku, Polysciences, Bangs Laboratories, Magsphere, Lab261 and Phosphorex.

The best supplier depends on particle size, application, surface chemistry and purchasing volume.

Why Is SANYU Ranked Second?

SANYU ranks second because it combines:

• Standard PMMA microspheres;

• Crosslinked PMMA;

• Carboxyl PMMA;

• Powder products;

• Aqueous suspensions;

• Small and large particle formats;

• Bulk packaging;

• OEM customization.

microParticles GmbH ranks first for France because it combines a very broad monodisperse PMMA platform with functionalized and fluorescent products and EU-based manufacturing.

Which Manufacturer Offers the Broadest PMMA Particle Size Range?

Cospheric offers PMMA spheres from approximately 1 μm to 3.5 mm.

SANYU also offers a broad PMMA portfolio extending from micrometre-scale particles to large hundreds-of-micrometre crosslinked beads.

microParticles GmbH covers approximately 100 nm to 1000 μm.

Which Manufacturer Offers Submicron PMMA Microspheres?

microParticles GmbH offers PMMA particles down to approximately 100 nm.

Magsphere lists PMMA latex products from 100 nm upward.

Polysciences offers a 0.30 μm monodisperse PMMA product.

Lab261 lists nano-scale PMMA options beginning below 100 nm.

Which Companies Offer Functionalized PMMA Microspheres?

Relevant options include:

• microParticles GmbH;

• SANYU;

• Lab261.

microParticles offers carboxyl and amino PMMA, SANYU offers carboxyl PMMA, and Lab261 lists COOH and NH₂ PMMA products.

Which Manufacturers Offer Fluorescent PMMA Microspheres?

microParticles GmbH and Lab261 both offer documented fluorescent PMMA particle platforms.

Which Manufacturers Offer Crosslinked PMMA?

Relevant suppliers include:

• SANYU;

• Sekisui Kasei;

• Matsumoto Yushi-Seiyaku.

Crosslinked particles are particularly useful where greater solvent or mechanical resistance is required.

Which PMMA Microspheres Are Best for Calibration?

Monodisperse products from microParticles GmbH, Cospheric, Bangs Laboratories, Magsphere and Lab261 are worth evaluating.

Calibration applications require careful verification of:

• Mean diameter;

• Traceability;

• CV;

• Measurement uncertainty;

• Refractive index.

Which PMMA Microspheres Are Best for Optical Applications?

Relevant suppliers include:

• Cospheric;

• SANYU;

• Sekisui Kasei;

• microParticles GmbH;

• Magsphere.

The most important parameters include:

• Particle diameter;

• Refractive index;

• Size distribution;

• Sphericity;

• Transparency.

Which PMMA Microspheres Are Best for Coatings?

Sekisui Kasei has particularly strong industrial expertise in PMMA particles for paints, inks, light diffusion and surface modification.

SANYU and Matsumoto Yushi-Seiyaku are also relevant candidates.

Are PMMA Microspheres More Hydrophilic Than Polystyrene?

PMMA is generally less hydrophobic than polystyrene.

Polysciences notes that its PMMA microspheres may show reduced nonspecific protein and peptide binding compared with polystyrene particles.

Actual biological performance still depends on:

• Surface chemistry;

• Surfactant;

• Buffer;

• Particle size;

• Protein.

What Is the Density of PMMA Microspheres?

A typical value is approximately 1.18–1.20 g/cm³.

microParticles GmbH reports 1.19 g/cm³, while Sekisui lists 1.2 g/cm³ for its PMMA MB Series.

What Is the Refractive Index of PMMA Microspheres?

A typical value is approximately 1.48–1.49.

Exact values can vary according to composition, crosslinking and wavelength.

Should I Buy PMMA as Dry Powder or Suspension?

Choose powder for:

• Coatings;

• Composites;

• Polymer modification;

• Porogens;

• High-solids processing.

Choose suspension for:

• Biological applications;

• Calibration;

• Particle counting;

• Microfluidics;

• Flow studies.

Are PMMA Microspheres Considered Microplastics in the EU?

Some PMMA microspheres may meet the EU definition of synthetic polymer microparticles if they satisfy the relevant criteria, including particle size, polymer composition, solubility and degradability.

The legal treatment also depends on the intended use and applicable exemptions or transitional provisions.

French buyers should assess the exact product under REACH Regulation (EU) 2023/2055 rather than assuming that all PMMA particles have the same regulatory status.

Are PMMA Microspheres Banned in France?

There is no simple blanket rule stating that all PMMA microspheres are prohibited in every French industrial, medical or research application.

EU REACH imposes restrictions on synthetic polymer microparticles, but it also contains derogations, transitional periods and application-specific requirements.

Each use should therefore be assessed individually.

Are There New Microplastics Reporting Requirements in 2026?

Yes.

ECHA states that some reporting obligations under the REACH synthetic polymer microparticle restriction began in 2026, with others beginning in 2027 depending on the actor and use.

Applicable organizations should determine whether their PMMA activities fall within those reporting requirements.

Is Phosphorex Still Selling Standard PMMA Microspheres?

Its standard PMMA product line has been discontinued.

Phosphorex currently states that it can continue to support PMMA customers through custom quantity orders subject to agreed minimum quantities.

How Many PMMA Suppliers Should Be Evaluated?

During material development, evaluating at least three technically relevant PMMA products is useful.

For critical commercial products, qualifying a technically acceptable secondary supplier can reduce supply-chain risk.

Particles from different manufacturers should not be assumed to be interchangeable.

Final Recommendations

France is an important European market for advanced materials, diagnostics, biotechnology, coatings, optics and industrial research, all of which can create specialized demand for precision PMMA microspheres.

microParticles GmbH ranks first because it combines EU-based supply with a strong PMMA-specific platform covering approximately 100 nm to 1000 μm particles, high monodispersity, functionalized surfaces and fluorescent PMMA.

SANYU ranks second and is the only Chinese manufacturer included. Its advantages include standard PMMA particles, crosslinked PMMA, carboxyl-functionalized PMMA, dry powders, aqueous suspensions, broad particle sizes, bulk packaging and OEM customization.

Cospheric ranks third because it offers an exceptionally broad PMMA diameter range from approximately 1 μm to 3.5 mm and additional silver-coated products.

Sekisui Kasei provides a highly developed industrial TECHPOLYMER portfolio including standard, crosslinked, monodisperse and porous PMMA particles.

Matsumoto Yushi-Seiyaku offers crosslinked and non-crosslinked PMMA microspheres with specialized spherical, hollow and alternative morphologies.

Polysciences supplies accessible monodisperse and broad-distribution PMMA products for research and life-science applications.

Bangs Laboratories brings strong diagnostic and analytical-particle expertise.

Magsphere offers an unusually broad aqueous PMMA latex catalog from approximately 0.1 μm to 40 μm.

Lab261 provides plain, functionalized, fluorescent and reference-grade PMMA for advanced analytical and microplastic research.

Phosphorex remains relevant for custom PMMA projects, although its former standard PMMA catalog products have been discontinued.

French buyers should compare:

• Particle diameter;

• Particle-size distribution;

• CV;

• Sphericity;

• PMMA density;

• Refractive index;

• Crosslinking;

• Surface functionality;

• Powder versus suspension;

• Solids concentration;

• Solvent resistance;

• Batch consistency;

• Quality documentation;

• EU REACH status;

• Commercial capacity;

• Customization;

• Change-control procedures.

For France in 2026, regulatory review is particularly important. PMMA microspheres that meet the EU definition of synthetic polymer microparticles may fall within REACH Entry 78, and applicable derogations, reporting duties and downstream-use conditions should be evaluated before commercial implementation.

Testing several representative PMMA microsphere grades under the actual optical, biological, coating or polymer-processing conditions remains the most reliable method for selecting a long-term supplier.