50 nm Carboxyl Polystyrene Microspheres, 5% Solids – CP050-10

SANYU GROUP Carboxyl Polystyrene Microspheres CP050-10 are high-quality monodisperse polymer microspheres with surface carboxyl (-COOH) functional groups. Manufactured using advanced emulsion polymerization technology, these microspheres provide excellent particle size uniformity, outstanding suspension stability and reliable batch-to-batch consistency.

CP050-10 has a nominal particle diameter of 50 nm (0.05 μm) and is supplied as a 5% solids aqueous suspension. The surface carboxyl groups can be activated using EDC or EDC/NHS chemistry for efficient covalent conjugation of antibodies, proteins, peptides, enzymes, nucleic acids and other biomolecules.

Carboxyl Polystyrene Microspheres are widely used in immunodiagnostics, lateral flow assays, nanoparticle research, biosensors, protein immobilization, molecular biology, biotechnology and life science research.

Key Features

• Nominal particle diameter: 50 nm

• 5% solids aqueous suspension

• Monodisperse spherical particles

• Surface carboxyl (-COOH) functional groups

• Excellent particle size uniformity

• High suspension stability

• Low coefficient of variation (CV)

• High biomolecule coupling efficiency

• Compatible with EDC and EDC/NHS chemistry

• Excellent batch-to-batch consistency

• Suitable for research and IVD reagent development

• OEM and customized manufacturing available

Technical Specifications

Applications

CP050-10 Carboxyl Polystyrene Microspheres are widely used in:

• Antibody conjugation

• Protein immobilization

• Peptide coupling

• DNA and RNA immobilization

• Immunoassay development

• Lateral Flow Immunoassays (LFIA)

• ELISA development

• Flow cytometry

• Latex agglutination assays

• Particle size calibration

• Instrument calibration

• Biosensor development

• Molecular diagnostics

• Clinical diagnostics

• Biotechnology research

• Life science research

Advantages of SANYU Carboxyl Polystyrene Microspheres

SANYU GROUP manufactures high-quality carboxyl-functionalized microspheres under strict quality control to ensure excellent product consistency and reliable performance.

Advantages include:

• Excellent particle size uniformity

• Highly monodisperse particles

• Stable surface chemistry

• Reliable biomolecule conjugation

• Low particle aggregation

• Long-term suspension stability

• Excellent reproducibility

• OEM and bulk production support

• Professional technical support

Surface Chemistry

CP050-10 contains surface carboxyl (-COOH) functional groups, providing reactive sites for covalent biomolecule immobilization.

Using EDC or EDC/NHS activation chemistry, the surface carboxyl groups react efficiently with primary amine groups to form stable amide bonds, enabling efficient conjugation of biomolecules.

Typical conjugated biomolecules include:

• Antibodies

• Antigens

• Proteins

• Peptides

• Enzymes

• DNA

• RNA

• Oligonucleotides

• Aptamers

The optimized surface chemistry provides reliable conjugation efficiency and reproducibility for diagnostic and biotechnology applications.

Storage and Stability

Store CP050-10 at 2–8°C.

• Do not freeze.

• Mix gently before use.

• Avoid repeated freeze-thaw cycles.

• Protect from direct sunlight.

Proper storage helps maintain excellent particle stability and conjugation performance.

Customization Service

SANYU GROUP offers comprehensive customization services, including:

• Customized particle diameter

• Customized solids content

• Customized surface carboxyl density

• Surface functionalization

• Buffer replacement

• Fluorescent microspheres

• Magnetic microspheres

• Colored microspheres

• Packaging customization

• OEM manufacturing

• Bulk production

Frequently Asked Questions About CP050-10

What is CP050-10?

CP050-10 is a 50 nm carboxyl-functionalized polystyrene microsphere supplied as a 5% solids aqueous suspension for diagnostics, calibration and life science research.

What particle size is CP050-10?

CP050-10 has a nominal particle diameter of 50 nm with excellent particle size uniformity.

Is 50 nm the same as 0.05 μm?

Yes.

50 nm = 0.05 μm.

What surface functional group does CP050-10 have?

CP050-10 features carboxyl (-COOH) functional groups, which can be activated using EDC or EDC/NHS chemistry for efficient biomolecule conjugation.

Is CP050-10 suitable for particle size calibration?

Yes.

Its excellent monodispersity makes it suitable for particle sizing, instrument verification and calibration applications.

Can CP050-10 be used for flow cytometry?

Yes.

CP050-10 is suitable for flow cytometry research and assay development.

Can antibodies or proteins be conjugated?

Yes.

The surface carboxyl groups can be activated using EDC or EDC/NHS chemistry for efficient covalent coupling with antibodies, proteins, peptides, enzymes and nucleic acids.

What does 5% solids mean?

CP050-10 is supplied as a 5% solids aqueous suspension, providing a stable particle concentration for research and diagnostic applications.

How should CP050-10 be stored?

Store at 2–8°C.

Do not freeze.

Avoid repeated freeze-thaw cycles.

Mix gently before each use.

Can the particle size, solids content or surface chemistry be customized?

Yes.

SANYU GROUP provides customization services including particle diameter, solids concentration, surface functionalization, surface carboxyl density, buffer formulation, package size and OEM production.

Do you provide samples?

Yes.

Sample availability depends on the requested specification, quantity and destination country.

Please contact our sales team with your application details.

What documents are available?

SANYU GROUP can provide:

• Certificate of Analysis (COA)

• Technical Data Sheet (TDS)

• Safety Data Sheet (SDS)

• Product Specification

• Particle Size Distribution Report (when available)

Request a Sample or Quotation

Looking for 50 nm Carboxyl Polystyrene Microspheres with 5% solids for diagnostics, nanoparticle research, particle calibration or bioconjugation?

Contact SANYU GROUP with your application requirements and quantity. Our technical team will recommend the most suitable standard or customized microsphere solution.