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Fluorescein

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Fluorescein / CAS : 2321-07-5

Appearance Orange to red crystalline powder UN 0.0
HS 32042000 DG Class 0.0
Synonyms Solvent Yellow 94; Angiofluor; Fluorescein (free acid); Fluorescein, Indicator; Eosin; Fluorecein; KI201; 3',6'-Dihydroxy-3H-Spiro[Isobenzofuran-1,9'-Xanthen]-3-one; Spiro[Isobenzofuran-1(3H),9‘-[9H]Xanthen]-3-one, 3‘,6‘-Dihydroxy-; Acid Yellow 73
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Properties

Summary

Formula
C20H12O5
Molecular Mass
332.30600
Exact Mass
332.06800
PSA
87.74000
Logp
3.96860
IUPAC
3',6'-dihydroxyspiro[2-benzofuran-3,9'-xanthene]-1-one
SMILES
C1=CC=C2C(=C1)C(=O)OC23C4=C(C=C(C=C4)O)OC5=C3C=CC(=C5)O

Attribute classification

Matter Classification
organic
Category
API & Intermediate > Diagnostic Agents
Dyestuffs and Pigments > Other Dyes

Chemical and Physical Properties

Melting Point
320 °C
Density
1.2739 (rough estimate)
Boiling Point
429.44°C (rough estimate)
Appearance
Orange to red crystalline powder
Acidity and Basicity
acidness

Export information

HS Code
32042000
Export Rebate
13%
UN No.
0.0
DG-Class
0.0
Risk Code
43-36-36/37/38
Safety Label
Xi

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