Microspheres

Small, spherical particles available in a range of sizes, colors, and material compositions, and possessing various surface modifications for specialized applications. These applications include use in assaying, calibration, labeling, flow cytometry, etc.

1 – 15 of 155 results

Thermo Scientific™ Ezy-Cal™ Count Precision Size Standards

Meet the unique and demanding requirements of the contamination control laboratory in modern industries.

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Pricing and Availability
Specifications

Stability	Product stable for a minimum of three months
Contents	Polystyrene microspheres in water
Product Type	Count Control Particles
Color	White or Colorless
Refractive Index	1.59 at 589nm (25°C)
Quantity	100 mL
Material	Polystyrene
Concentration	2000 particles/mL ± 10%
For Use With (Application)	Liquid Particle Counter Calibration

Thermo Scientific™ 3000 Series Nanosphere™ Size Standards

Conveniently check the sizes of bacteria, viruses, ribosomes and sub-cellular components with these size standards.

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Pricing and Availability
Specifications

Particle Density	1.05g/cm³
Content And Storage	Unless otherwise stated, refrigerate (2° to 8°C) product when not in use but do not freeze. Store upright and keep bottle tightly sealed. Mix product with gentle inversion by hand or vortex mixer.
Stability	Product stable for a minimum of 24 months
Description	3000 Series Nanosphere Size Standards come in optimized concentrations for easy dispersal and colloidal stability.
Color	White or Colorless
Quantity	15 mL
Material	Polystyrene
Concentration	1% solids
For Use With (Application)	Electron Microscope Calibration
Includes	Certificate of Calibration and Traceability to NIST
Additive	Contains trace amount of surfactant to inhibit agglomeration and promote stability
Contents	Polymer particles in water
Product Type	Size Standard Particles
Refractive Index	1.59 at 589nm (25°C)

Cytiva Sera-Mag SpeedBeads™ Carboxyl Magnetic Beads, hydrophobic

Excellent for coupling oligos or proteins directly to the beads. Their cauliflower-like structure gives Sera-Mag beads high binding capacity. The carboxyl groups on these beads can be activated by standard EDC/EDAC chemistry to react with free amino groups, forming amide bonds.

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Pricing and Availability
Specifications

Content And Storage	2°C to 8°C
Diameter (Metric)	1 μm
Concentration	5% solids (50mg/mL)
For Use With (Application)	DNA Sample Prep,Protein Purification

Cytiva Sera-Mag SpeedBeads™ Carboxyl Magnetic Beads, hydrophilic

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Pricing and Availability
Specifications

Content And Storage	2°C to 8°C
Diameter (Metric)	1 μm
Concentration	5% solids (50mg/mL)
For Use With (Application)	DNA Sample Prep,Protein Purification

Cytiva SpeedBeads™ Magnetic Neutravidin Coated Particles, 1 um, 1% solids, 0.05% Na azide

Capture of Biotinylated Probes. Their cauliflower-like structure gives Neutravidin beads high binding capacity. Neutravidin SpeedBeads combine fast reaction kinetics and low, non-specific binding for increased throughput and precision in immunoassay and molecular biology applications.

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Pricing and Availability
Specifications

Includes	0.05% Na azide
Content And Storage	2°C to 8°C
Diameter (Metric)	1 μm
Concentration	1% solids (10mg/mL)
For Use With (Application)	Immunoassays,cDNA Library Construction,Capture of Biotinylated Targets

IBA Lifesciences MagStrep 'Type3' Strep-Tactin Beads 5% Suspension

MagStrep 'type3' Strep-Tactin beads 5% suspension are magnetic beads to purify biotinylated proteins.

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Thermo Scientific™ COUNT-CAL™ Count Precision Size Standards

Minimize contamination by eliminating the need for serial dilutions and extensive sample handling with Thermo Scientific™ COUNT-CAL™ Count Precision Size Standards.

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Pricing and Availability
Specifications

Includes	Certificate of Calibration and Traceability to NIST, Particle Counting Protocol
Stability	Product stable for a minimum of six months
Description	Products provide a precise method for calibrating or checking the performance of laser particle counters
Contents	Polystyrene microspheres in water
Product Type	Count Control Particles
Color	White or Colorless
Refractive Index	1.59 at 589nm (25°C)
Quantity	6 x 25 mL
Material	Polystyrene
Concentration	3000 particles/mL ± 10%
Certifications/Compliance	Certificate of Calibration and Traceability to NIST
For Use With (Application)	Liquid Particle Counter Validation,USP Verification
Size Distribution	<3%

Thermo Scientific™ PHARM-TROL™ Count Precision Size Standards

Document the reproducibility of a particle counter by permitting a continuous record of its performance.

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Pricing and Availability
Specifications

Includes	Certificate of Calibration and Traceability to NIST
Particle Density	1.05g/cm³
Stability	Product stable for a minimum of 12 months
Contents	Polystyrene microspheres in water
Product Type	Count Control Particles
Color	White or Colorless
Refractive Index	1.59 at 589nm (25°C)
Material	Polystyrene
Concentration	3800 particles/mL ± 15%
For Use With (Application)	USP Verification
Size Distribution	<3%

Thermo Scientific™ 4000 Series Monosized Particles

Minimize response of analytic systems to shape effects with monosized particles.

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Pricing and Availability
Specifications

Includes	Certificate of Calibration and Traceability to NIST
Particle Density	1.05g/cm³
Stability	Product stable for a minimum of 24 months
Description	NIST traceable particles that provide calibration of laser particle counters
Product Type	Size Standard Particles
Color	White or Colorless
Material	Polystyrene
Certifications/Compliance	Each package of standards contains a Certificate of Calibration and Traceability to NIST which includes a description of the calibration method and its uncertainty, and a table of chemical and physical properties.
For Use With (Application)	Narrow Size Standard Deviation Applications

Thermo Scientific™ Validex™ Count Precision Size Standards

Validate the performance of liquid particle counters with Thermo Scientific™ Validex™ Count Precision Size Standards.

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Pricing and Availability
Specifications

Content And Storage	Unless otherwise stated, refrigerate (2° to 8°C) product when not in use but do not freeze. Store upright and keep bottle tightly sealed. Mix product with gentle inversion by hand or vortex mixer.
Stability	Product stable for a minimum of 3 months
Description	Designed specifically for the drinking water industry to validate the performance of liquid particle counters.
Color	White or Colorless
Quantity	500 mL
Material	Polystyrene
Concentration	1000 particles/mL ± 10%
For Use With (Application)	Liquid Particle Counter Validation
Size Distribution	<3
Includes	Certificate of Calibration and Traceability to NIST
Additive	Contains trace amount of surfactant
Contents	Polymer particles in water
Product Type	Count Control Particles
Refractive Index	1.59 at 589nm (25°C)

Thermo Scientific™ 3K/4K Series Particle Counter Standards

Ensure accurate and convenient calibration of laser particle counters with Thermo Scientific™ 3K/4K Series Particle Counter Standards.

Pricing and Availability
Specifications

Includes	Certificate of Calibration and Traceability to NIST
Additive	Contains trace amount of surfactant to inhibit agglomeration and promote stability
Description	NIST traceable particles that provide calibration of laser particle counters
Contents	Polymer particles in water
Product Type	Count Control Particles
Color	White or Colorless
Refractive Index	1.59 at 589nm (25°C)
Quantity	15 mL
Material	Polystyrene
For Use With (Application)	Laser Particle Counter Calibration

Thermo Scientific™ MagnaBind™ Amine Derivatized Beads

Enable benchtop magnetic affinity purification with these ligand-coated (streptavidin, Protein A and G, GAM IgG, GAR IgG) magnetic particles and magnet separators.

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Thermo Scientific™ Fluoro-Max Dyed Green Aqueous Fluorescent Particles

Improve sensitivity and detectability for analytical methods with green aqueous fluorescent particles.

Pricing and Availability
Specifications

Includes	Package Insert Sheet
Particle Density	1.05g/cm³
Content And Storage	Unless otherwise stated, refrigerate (2° to 8°C) product when not in use but do not freeze. Store upright and keep bottle tightly sealed. Mix product with gentle inversion by hand or vortex mixer. Product comes with stir bar for continual mixing duriong sampling.
Additive	Trace amounts of surfactant to inhibit agglomeration and promote stability
Stability	Product stable for a minimum of 24 months
Contents	Dyed polystyrene microspheres in water
Product Type	Fluorescent Particle
Color	Green
Refractive Index	1.59 at 589nm (25°C)
Material	Polystyrene
Concentration	1% solids
Dye Type	Firefli™ Fluorescent Green (468/508nm)

Thermo Scientific™ Duke Standards™ 2000 Series Uniform Polymer Particles

Analyze wide size range materials through laser diffraction or other methods with uniform polymer particles that mimic real world particles.

Pricing and Availability
Specifications

Includes	Material Safety Data Sheet (MSDS), Certificate of Calibration and Traceability to NIST
Particle Density	1.05g/cm³
Content And Storage	Store at room temperature or keep refrigerated. Keep bottle tightly sealed to avoid contamination.
Additive	Contains trace amount of surfactants
Stability	=24 months
Product Type	Polymer Particles
Color	White or Colorless
Refractive Index	1.59 at 589nm (25°C)
Quantity	15 mL
Material	Polystyrene Divinylbenzene (PS-DVB)
For Use With (Application)	Narrow Size Standard Deviation Applications

Thermo Scientific™ 9000 Series Glass Particle Standards

Replace polystyrene spheres in many applications with dry glass NIST™-traceable size standards.

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Pricing and Availability
Specifications

Content And Storage	Store at room temperature. Keep bottle tightly sealed to avoid contamination.
Additive	None
Stability	Product stable for a minimum of 24 months
Product Type	Size Standard Particles
Color	White
Quantity	1 g
For Use With (Application)	Narrow Size Standard Deviation Applications

Microspheres

Microspheres

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