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 458 results

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

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

Pricing and Availability

Thermo Scientific™ 4D Series Dry Microsphere Size Standards

Calibrate airborne optical particle counters to comply with ISO 21501-4 with Thermo Scientific™ 4D Series Dry Microsphere Size Standards.

Pricing and Availability
Specifications

Content And Storage	Unless otherwise stated, store at ambient room temperature. Store upright; keep bottle tightly sealed. Mix product with gentle inversion by hand or vortex mixer.
Additive	Trace flow agent
Contents	1g
Product Type	Size Standard Particles
Color	White
Refractive Index	1.59 at 589nm (25°C)
Material	Polystyrene Divinylbenzene (PS-DVB)
Concentration	100% solids
Certifications/Compliance	Certificate of Calibration and Traceability to NIST, MSDS
For Use With (Application)	Airborne Optical Particle Counter Calibration

Thermo Scientific™ 4000 Series Monosized Particles

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

Promotions are available

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™ 3000 Series Nanosphere™ Size Standards

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

Promotions are available

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)

Thermo Scientific™ Validex™ Count Precision Size Standards

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

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™ 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.

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

Invitrogen™ FluoSpheres™ Carboxylate-Modified Microspheres

Achieve the brightest fluorescence with Carboxylate-Modified FluoSphere Microspheres, available in different colors and particle sizes.

Pricing and Availability
Specifications

Product Type	Carboxylate-Modified Microsphere
Surface Modification	Carboxylate
Material	Polystyrene
For Use With (Application)	Fluorescence Microscopy
Product Line	FLUOSPHERES™

Invitrogen™ TetraSpeck™ Fluorescent Microspheres Size Kit (mounted on slide)

For calibration of wide field, TIRF and confocal fluorescence microscopes, especially for multicolor applications like colocalization analysis and derivation of point spread functions critical for deconvolution

Pricing and Availability

Thermo Scientific™ Dri-Cal™ Particle Size Standards

Use Thermo Scientific™ Dri-Cal™ Particle Size Standards for calibrating particle sizing and counting instruments that require dry particles.

Pricing and Availability
Specifications

Particle Density	1.05g/cm³
Content And Storage	Store at room temperature in a dry area. Store upright and keep bottle tightly sealed. Respiratory protection from dust is recommended.
Stability	Product stable for a minimum of 24 months
Description	Used for calibrating particle sizing and counting instrumentation that require dry particles for measuring dry media.
Color	White
Quantity	1 g
Material	Polystyrene Divinylbenzene (PS-DVB)
Concentration	100% solids
For Use With (Application)	Dry Particle Counter Calibration
Includes	Certificate of Calibration and Traceability
Additive	May contain trace amount of dispersant
Contents	Dry dyed polystyrene (DVB) microspheres
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.

Promotions are available

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

Promotions are available

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.

Promotions are available

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

Gibco™ Dynabeads™ Human T-Activator CD3/CD28 for T Cell Expansion and Activation

Dynabeads Human T-Activator CD3/CD28 beads are 4.5-μm superparamagnetic beads covalently coupled with an optimized combination of anti-human CD3 and anti-human CD28 antibodies and intended for ex vivo activation and expansion/proliferation of human T cells.

Pricing and Availability
Specifications

Shipping Condition	Ambient Temperature
Clonality	Monoclonal
Target Species	Human T-cells
Host Species	Mouse
Surface Functionality	Epoxy
Isolation Technology	Magnetic Beads
Material	Magnetic Polystyrene
Concentration	4 x 10 ⁷ Beads/mL
For Use With (Application)	Activation and Expansion of T-cells
Regulatory Status	For Research Use Only
Reactivity	Human
For Use With (Equipment)	DynaMag™ Magnet
Product Type	Antibody Coated Bead
Diameter (Metric)	4.5 μm
Shelf Life	24 months from date of manufacture
Certifications/Compliance	ISO9001 and ISO13485
Uniformity	Monosized 4.5 μm (CV <5%)
Product Line	DynaBeads™

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.

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%

Microspheres

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