Zepto™ Ultra Red Carboxyl Microspheres (2.5µm), 1ML
Bead Diameter: 2.5µm
Composition: Polystyrene
Surface Functionality: Carboxyl
Carboxyl Parking Area: ~2.5nm2/-COOH group
Excitation Wavelength: <650nm
Emission Wavelength: 665nm
Bead Concentration: 1E+8 particles/ml (0.1% w/v)
Volume: 1ml in ddH2O

Fig 1. Emission spectra of Cytodiagnostics ZeptoTM Ultra Red Microspheres.

Fig 2. Typical flow cytometry analysis data for Cytodiagnostics ZeptoTM Ultra Red Microspheres showing a side-scatter vs forward-scatter plot (left) and the obtained fluorescence histogram (right).