Thermo Scientific™ ChromoSphere™-T Certified Size Standards

Achieve high visual contrast with Thermo Scientific™ ChromoSphere™-T Certified Size Standards, colored polymer microspheres with NIST™-traceable diameters.

Product Code	Brand	Diameter (Metric)	Material	Color	Size Distribution
11838223	Thermo Scientific™ BK050T	50 μm	Polystyrene Divinylbenzene (PS-DVB)	Black	s = 3.6µm, 7.3% CV
11858223	Thermo Scientific™ BK100T	100 μm	Polystyrene Divinylbenzene (PS-DVB)	Black	s = 7.1µm, 7.5% CV
11878223	Thermo Scientific™ BK150T	150 μm	Polystyrene Divinylbenzene (PS-DVB)	Black	s = 7.8µm, 5.2% CV
11898223	Thermo Scientific™ BK200T	200 μm	Polystyrene Divinylbenzene (PS-DVB)	Black	s = 10µm, 5.0% CV
11818233	Thermo Scientific™ BK300T	300 μm	Polystyrene Divinylbenzene (PS-DVB)	Black	s = 7.5µm, 2.5% CV
11838233	Thermo Scientific™ BK400T	400 μm	Polystyrene Divinylbenzene (PS-DVB)	Black	s = 18µm, 4.8% CV
11858233	Thermo Scientific™ BK500T	500 μm	Polystyrene Divinylbenzene (PS-DVB)	Black	s = 22µm, 4.5% CV
11844902	Thermo Scientific™ RD050T	50 μm	Polystyrene Divinylbenzene (PS-DVB)	Red	s = 3.8µm, 7.7% CV
11864902	Thermo Scientific™ RD100T	100 μm	Polystyrene Divinylbenzene (PS-DVB)	Red	s = 7.5µm, 7.8% CV
11884902	Thermo Scientific™ RD150T	150 μm	Polystyrene Divinylbenzene (PS-DVB)	Red	s = 9.0µm, 6.0% CV
11804912	Thermo Scientific™ RD200T	200 μm	Polystyrene Divinylbenzene (PS-DVB)	Red	s = 9.5µm, 4.7% CV
11824912	Thermo Scientific™ RD300T	300 μm	Polystyrene Divinylbenzene (PS-DVB)	Red	s = 11µm, 3.5% CV
11844912	Thermo Scientific™ RD400T	400 μm	Polystyrene Divinylbenzene (PS-DVB)	Red	s = 18 µm, 4.4% CV
11864912	Thermo Scientific™ RD500T	500 μm	Polystyrene Divinylbenzene (PS-DVB)	Red	s = 24µm, 4.8% CV

Description

Achieve high visual contrast with Thermo Scientific™ ChromoSphere™-T Certified Size Standards, colored polymer microspheres with NIST™-traceable diameters. These reference and calibration materials are used in the testing of filtration systems, vial cleaning evaluations, contamination control studies and calibration of injection devices.

ChromoSphere-T Size Standards were developed for use as reference or calibration materials in applications where a high visual contrast is desired. The product line consists of a large assortment of uniform particle sizes between 50 and 500 microns in either red or black color.

• Internally dyed with deeply colored red or black dyes, resulting in very high contrast and visibility relative to most background materials
• Mean diameters traceable to the standard meter through the National Institute of Standards and Technology (NIST)
• Calibrated by optical microscopy
• Made from cross-linked polystyrene divinylbenzene (PS-DVB) copolymer
• Available as dry powders
• Easily dispersed in aqueous media with the aid of a small amount of surfactant or in lower alcohols, such as methanol or ethanol
• Minimal dye extraction when particles are suspended in pure alcohols

Note:

• Other organic solvents, such as ethers or chlorinated hydrocarbons, should be avoided because they will swell the particles and completely extract the dye.

Specifications

• Additive: May contain trace amount of dispersant
• Concentration: 100% solids
• Contents: Dry dyed polystyrene (DVB) microspheres
• For Use With (Application): Cleaning Evaluation, High Contrast Reference and Calibration
• Product Type: Size Standard Particles
• Particle Density: 1.05g/cm³
• Refractive Index: 1.59 at 589nm (25°C)

• Certifications/Compliance: Certificate of Calibration and Traceability to NIST
• Content And Storage: Store at room temperature in a dry area. Store upright and keep bottle tightly sealed. Respiratory protection from dust is recommended.
• Description: Designed for use as reference or calibration materials in applications where high contrast is required.
• Material: Polystyrene Divinylbenzene (PS-DVB)
• Includes: Certificate of Calibration and Traceability to NIST
• Quantity: 1 g
• Stability: Product stable for a minimum of 24 months