Thermo Scientific™ Dyed Red Aqueous Fluorescent Particles Available on GSA/VA Contract for Federal Government customers only.

Improve sensitivity and detectability for analytical methods with microsphere suspensions that are internally dyed and feature bright, high-contrast colors.

Manufacturer: Thermo Scientific™ R50

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Catalog No. 09-980-454

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    Uniformity <15%
    Diameter (Metric) 0.05µm
    Additive Trace amounts of surfactant to inhibit agglomeration and promote stability
    Diameter (Metric) Mean 0.05µm
    Diameter (Metric) Nominal 0.05µm
    Dye Type Firefli Fluorescent Red (542/612nm)
    Includes Package Insert Sheet
    Particle Size (Metric) 0.05µm
    Storage Requirements 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.
    Color Red
    Contents Dyed polystyrene particles in water
    Particle Density 1.05g/cm³
    Quantity 1 ea.
    Refractive Index 1.59 at 589nm (25°C)
    Stability Product stable for a minimum of 24 months
    Composition Polystyrene
    Concentration 1% solids
    Particle Size 0.05µm
    Volume (Metric) 15mL

    Improve sensitivity and detectability for analytical methods with Thermo Scientific™ Fluoro-Max Red Aqueous Fluorescent Particles, microsphere suspensions that are internally dyed and feature bright, high-contrast colors.

    Fluoro-Max fluorescent particles emit bright and distinct colors when illuminated by the light of shorter wavelengths than the emission wavelength, improving their contrast and visibility relative to background materials.These internally dyed polymer particles utilize the exclusive Firefli™ process to incorporate the dye throughout the polymer matrix to produce bright fluorescent colors, minimize photo bleaching and prevent dye leaching into aqueous media.


    • Made of polystyrene (PS), which has a density of 1.05g/cm3 and a refractive index of 1.59 @ 589nm (25°C)
    • Aqueous suspensions are packaged as 1% solids
    • Can be detected with an epifluorescence microscope, confocal microscope, fluorometer, fluorescence spectrophotometer or fluorescence activated cell sorter
    • Can also be detected using mineral light or black light (UV)

    Spectral information is approximate and for reference only. Spectral properties of the dyes are dependent on their concentration and physical environment. The exact excitation and emission maxima may vary depending on the size and composition of the particles.

    Recommended for:

    • Filter testing
    • Flow tracing
    • Biological research

  • Description & Specifications

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