• resorcinolphthalein, C.I. 45350, solvent yellow 94, D & C yellow no. 7, angiofluor, Japan yellow 201, soap yellow

Article No. 03855 Grade
Purity 95% CAS No. 2321-07-5
Molecular Formula C20H12O5 Molecular Weight 332.31
H.S. Code 3204.1200 Shelf Life 5 Years
C.I.No.45350 Fluorescein is a fluorophore commonly used in microscopy, in a type of dye laser as the gain medium, in forensics and serology to detect latent blood stains, and in dye tracing.


Safety Information and Hazard Symbols

Exclamation Mark
Symbol: GHS07
Signal Word: Warning
Hazardous Statement: H319
Precaution Statement: P305 + P351 + P338


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Revision Date : 18-Apr-2014


Appearance Orange red brown or maroon powder
Assay (on dried substances) Min 95%
Solubility (in 1N NaOH) 50 mg/ml
Molar Absorptivity E(490+/-2nm) Min 70000
E(284+/-2nm) Min 12000
E(238+/-2nm) Min 39000
Loss on drying (at 105 °C) Max 5.0%
Melting point About 315 °C