10 Carboxyl Polystyrene Microsphere Manufacturers and Suppliers for the UAE in 2026

Carboxyl Polystyrene Microsphere Suppliers for the UAE

Carboxyl polystyrene microspheres are polymer particles containing surface carboxyl groups that support covalent biomolecule attachment. They are used in diagnostic latex reagents, lateral flow development, fluorescent assays and other bioanalytical applications.

For UAE buyers, selecting a supplier requires matching particle size, surface chemistry and optical properties to the intended assay.

This guide compares ten international manufacturers and suppliers that UAE developers, laboratories and distributors can evaluate. Companies appear in presentation order. Confirm the selected product’s availability, intended-use labeling and delivery arrangements for the UAE before purchasing.

Quick Comparison

1. Merck

Merck supplies Estapor microspheres for diagnostic reagent development. Its portfolio includes white carboxylated particles for latex turbidimetric immunoassays and dyed carboxylated particles for lateral flow applications.

The range provides different particle sizes and surface characteristics for assay screening.

UAE developers should select the appropriate optical format, then evaluate coupling, background and analytical response using their intended antibody, sample matrix and reader.

2. SANYU GROUP

SANYU GROUP is a Chinese microsphere manufacturer supplying carboxyl-functionalized polystyrene particles for diagnostic development and bioconjugation.

Its portfolio includes nonfluorescent COOH PS, colored carboxylated particles and fluorescent carboxylated microspheres. These formats support different optical detection strategies.

Customization discussions can cover particle diameter, solids concentration, surface chemistry and packaging.

UAE buyers can provide their assay application and target specifications to discuss development samples. Pilot requirements and expected annual consumption help establish a suitable production supply plan.

3. MBL Materials / MBL

IMMUTEX latex particles are manufactured by MBL Materials, with sales handled through MBL. The materials manufacturer changed its name from JSR Life Sciences Corporation in October 2025.

IMMUTEX includes plain and carboxylated polystyrene latex grades. The carboxyl series supports covalent attachment of antibodies or antigens.

Buyers should compare the selected grade’s particle size, carboxyl content and suspension characteristics when developing diagnostic latex reagents.

4. Bangs Laboratories

Bangs Laboratories supplies carboxylated polystyrene microspheres for covalent biomolecule immobilization. Its wider portfolio also includes dyed and fluorescent carboxylated particles.

The company offers custom particle services and technical resources on microsphere handling and coupling.

UAE developers should identify the required particle format and request product-specific characterization. Evaluate the conjugated material for dispersion, functional activity and performance within the complete assay.

5. Polysciences

Polysciences supplies Polybead carboxylate microspheres and Fluoresbrite carboxylate fluorescent particles. Its catalog also includes dyed carboxylated polystyrene options.

These products are relevant when developers need to screen different sizes or optical labels.

When comparing quotations, check the exact grade, solids concentration and suspension formulation. Similar product descriptions do not establish equivalent coupling behavior or assay performance.

6. Spherotech

Spherotech supplies SPHERO functionalized polystyrene particles, including carboxylated grades. Its broader portfolio includes colored and fluorescent particles for different detection formats.

The company is relevant to coupling experiments, optical assay development and specialized particle applications.

Buyers should confirm that the selected product has the required surface chemistry, then evaluate biomolecule attachment, suspension stability and optical response under their intended conditions.

7. Magsphere

Magsphere supplies carboxylated polystyrene particles alongside colored carboxylated grades. Red and blue dyed particles are relevant to assays requiring visible labels, including lateral flow development.

The company also offers custom particle synthesis.

For a UAE rapid-test project, compare particle diameter, color intensity, conjugation behavior and membrane migration. Evaluate test-line development and background using the intended strip materials and running buffer.

8. microParticles GmbH

microParticles GmbH supplies functionalized polystyrene particles with carboxyl, amino and streptavidin options. Its COOH-functionalized PS products are relevant to bioconjugation and diagnostic assay development.

The company also supports discussions around additional functionalization.

Buyers should request characterization for the exact PS grade, including particle distribution and surface information. Compare results using consistent measurement methods and representative assay conditions.

9. Thermo Fisher Scientific

Thermo Fisher Scientific supplies carboxylate-modified FluoSpheres made from polystyrene and loaded with fluorescent dyes.

These particles are relevant to fluorescent immunoassays, microscopy, flow cytometry and other laboratory applications requiring fluorescent labels.

Select the particle diameter and fluorescence spectrum appropriate to the instrument. UAE buyers should also confirm the selected product’s intended-use labeling and available supply arrangements for their project.

10. DiaSorin Luminex

DiaSorin Luminex supplies MicroPlex carboxylated polystyrene microspheres containing spectral identifiers for xMAP multiplex assays.

MicroPlex particles are nonmagnetic and allow compatible instruments to distinguish individual bead populations.

They are relevant when developers require multiple capture reactions within a shared assay format. Selection should consider bead regions, coupling chemistry and reader compatibility. MicroPlex is not compatible with the MAGPIX system.

Choose the Particle Format for the Detection Method

Carboxylated PS particles can serve different roles depending on their optical properties.

Nonfluorescent, undyed particles are commonly evaluated for latex agglutination and particle-enhanced immunoturbidimetric reagents.

Colored particles provide visible labels for lateral flow and other visual detection formats.

Fluorescent particles require an instrument with suitable excitation and emission channels.

Encoded particles provide an additional identification signal for multiplex detection on a compatible platform.

Define the required detection format before comparing supplier catalogs.

Understand the Coupling Requirements

Surface COOH groups can be activated using carbodiimide chemistry for reaction with accessible primary amines on antibodies, proteins or other biomolecules.

For oligonucleotide attachment through this route, an appropriate amino modification is generally required.

Coupling performance depends on the particle surface, activation conditions, biomolecule loading and subsequent blocking or stabilization.

A higher reported carboxyl content does not automatically produce a better assay. Evaluate functional binding activity, aggregation, background and final analytical response.

Use a suitable coupling procedure for the selected particles and confirm that the reaction buffer is compatible with the chemistry.

Specifications to Compare

Surface measurements from different methods may not be directly comparable. Likewise, particle-size results should be interpreted together with the measurement technique used.

Screen Samples in the Intended Assay

For immunoturbidimetric development, evaluate baseline absorbance, analyte response, reaction kinetics, precision and the usable measuring range.

For lateral flow, examine conjugate release, membrane migration, test-line signal and background. Test the intended sample matrix and strip formulation.

For fluorescent assays, assess signal strength, reader compatibility, background and fluorescence stability after conjugation.

Check particle dispersion before coupling and again after conjugation and formulation. Aggregation can affect both handling and optical measurements.

Before adopting a production material, compare independent lots and assess stability in the final reagent.

Purchasing and Delivery Considerations for UAE Buyers

Provide the delivery location, such as Dubai, Abu Dhabi or Sharjah, when requesting a quotation.

Confirm whether ordering will be handled through a regional distributor or directly with the manufacturer. Ask about sample availability, production lead time and remaining shelf life on arrival.

Transport packaging should follow the selected product’s instructions. Discuss acceptable temperature exposure and freezing restrictions where applicable.

For distributors, clarify packaging, labeling and documentation requirements before ordering.

For recurring production supply, agree on the particle specification and confirm that development samples and bulk deliveries follow the same acceptance criteria.

Compare Prices Using Actual Particle Content

Bottle volume alone does not establish material value.

For example, a 10 mL suspension containing 50 mg/mL provides 500 mg of particles. A different solids concentration changes the quantity available for conjugation.

A practical comparison also considers coupling losses, particle consumption per test, additional formulation work and freight.

For fluorescent or encoded particles, include instrument requirements and the usable assay output when evaluating overall cost.

Information to Include in an RFQ

Provide:

• Intended assay and detection method.

• Required particle diameter and surface chemistry.

• Undyed, colored, fluorescent or encoded format.

• Solids concentration and preferred suspension formulation.

• Biomolecule to be attached and coupling strategy.

• Evaluation quantity, pilot requirement and annual demand.

• Required characterization and lot documentation.

• Customization or packaging requirements.

• UAE delivery address and desired schedule.

Frequently Asked Questions

Which Particles Should Be Evaluated for Immunoturbidimetric Assays?

Undyed carboxylated PS particles are common candidates. Select the diameter and surface characteristics through testing on the intended analyzer and reagent formulation.

Can Colored and Fluorescent Particles Be Used Interchangeably?

Their detection requirements differ. Colored particles provide visible signals, while fluorescent particles require suitable excitation and emission measurement. Evaluate the format appropriate to the reader.

Are MicroPlex and MagPlex the Same Product?

MicroPlex particles are nonmagnetic, while MagPlex particles are magnetic. Their instrument compatibility and handling requirements should be checked for the intended platform.

Can SEM Images Confirm Carboxyl Functionalization?

SEM can show particle morphology and visible aggregation. Surface carboxyl groups require appropriate chemical characterization; morphology alone does not establish functionalization.

Conclusion

Selecting a carboxyl polystyrene microsphere supplier for the UAE requires matching particle chemistry, optical format and supply conditions with the intended assay. Coupling evaluation, particle stability and lot consistency help support dependable reagent development.

SANYU GROUP offers carboxyl polystyrene microspheres for bioconjugation and diagnostic latex development, colored carboxyl polystyrene microspheres for visible detection formats and fluorescent carboxyl polystyrene microspheres for instrument-based fluorescence applications. UAE buyers can share their application and target specifications to discuss samples, customization and bulk supply.