Fluorescein

Melting point :320 °C(lit.)
Boiling point :429.44°C (rough estimate)
Density :1.2739 (rough estimate)
refractive index :1.5000 (estimate)
storage temp. :room temp
solubility :Solubility Insoluble in water, ether, benzene, chloroform; soluble in ethanol, methanol, acetone, Iethyl acetate, N,N-dimethylformamide
Colour Index :45350
form :Powder
pka :2.2, 4.4, 6.7(at 25℃)
color :Red to orange
PH Range :Pink uorescence (4.0) to green uorescence (6.0)
Water Solubility :insoluble
λmax :493.5nm, 496nm, 460nm, 515nm
ε(extinction coefficient) :≥12000 at 282-286nm
≥39000 at 236-240nm
≥70000 at 488-492nm Merck :14,4159
BRN :94324
Stability :Stable. Combustible. Incompatible with strong oxidizing agents.
Major Application :Organic light-emitting diode, nanoparticles, liquid crystal display, oil products, lip make-up, nucleic acid synthesis, amplification, sequencing and cloning, diagnosis of diabetic retinopathy, detecting yeast, multidrug resistance, proteins, antiHCV antibodies, target genes, enzymatic activity, nerve agent, nucleic acid sequences, imaging lung cancer, prostate cancer
Biological Applications :Detecting chromosomal aberration; diagnosing corneal diseases; marking/detecting insects; as antitumor agent; as antihistaminic agent; use in agriculture and plant cultivation; use in cosmetics; use in ophthalmology; as a substrate for measuring α-amylases activity, elastases activity, esterases activity, β-glucuronidases activity, horseradish peroxidases activity, kinases activity, monoamine oxidases (MAOs) activity, phosphatases activity, phospholipases activity, proteases/proteinases activity, telomerases activity activity
Cosmetics Ingredients Functions :HAIR DYEING
COLORANT LogP :2.980 (est)
CAS DataBase Reference :2321-07-5(CAS DataBase Reference)
EPA Substance Registry System :Fluorescein (2321-07-5)

Symbol(GHS):
Signal word:	Warning
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
Precautionary statements:	P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.