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Fluorescein Structure

Fluorescein

Chemical Properties

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
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
LogP 2.980 (est)
FDA 21 CFR 74.1707; 74.2707; 82.1707
CAS DataBase Reference 2321-07-5(CAS DataBase Reference)
EWG's Food Scores 1
FDA UNII TPY09G7XIR
ATC code S01JA01,S01JA51
EPA Substance Registry System Fluorescein (2321-07-5)

Safety

Symbol(GHS)
Signal wordWarning
Hazard statements H319
Precautionary statements P305+P351+P338
Hazard Codes  Xi
Risk Statements  43-36-36/37/38
Safety Statements  22-24/25-37/39-26-36/37/39-27
WGK Germany  3
RTECS  LM5075000
10-21
TSCA  Yes
HS Code  32042000
Hazardous Substances Data 2321-07-5(Hazardous Substances Data)
NFPA 704:
0
2 0

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