view cartPlain and Surface-ModifiedPolystyreneNISTCarboxylated PSAminated PSColor Latex BeadsRed PolystyreneBlue PolystyreneRed CarboxylatedBlue CarboxylatedMagneticPolystyrene MagneticCarboxylated MagneticFluorescentFLUOR PolystyreneFLUOR AminatedFLUOR CarboxylatedSurfactant FreeSurfactant FreeCarboxylated Surfactant FreeSpecialtyPMMADVBNon-spherical Bright Fluorescent Aminated ParticlesExcitation and emission spectra can be found below.Our Bright Fluorescent Particles are polystyrene-based nanospheres and microspheres that are made with fluorescent dyes. We offer four different colors (Yellow-Green, Red, Blue, and Orange) with either unmodified, carboxylated, or aminated functional groups.These fluorescent beads are used for tracking and visualization applications that require high-intensity fluorescence. Some common applications include stem cell labeling, filtration system testing, and fluorescent particle imaging velocimetry. For flow cytometry applications, please see our Flow Cytometer Beads (provide link).The excitation and emission spectra for our fluorescent beads are shown below.Product specifications:Concentration: aqueous suspension of 2.5% w/vaverage diameter tolerance will be within 10% of each specified catalog numberNaN3 preservative <=0.1%recommended storage 2–8oCavailable for order in 5mL, 15mL, and 100mL quantitiesspecial bulk pricing available for >=500mL (contact us for a quote)Magenta Fluorescent Aminated ParticlesOur Magenta Fluorescent Particles are polystyrene-based nanospheres and microspheres that produce a high quantum yield. They are offered with either unmodified, carboxylated, or aminated functional groups. Magenta Fluorescent Particles can be excited with either a UV laser or a 640nm laser (via cytometer analysis).Product specifications:Concentration: aqueous suspension of 2.5% w/vaverage diameter tolerance will be within 10% of each specified catalog numberNaN3 preservative <=0.1%recommended storage 2–8oCavailable for order in 5mL, 15mL, and 100mL quantities