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Acid Yellow 73

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Acid Yellow 73 / CAS : 518-47-8

Appearance Rust-orange. Powder UN 0
HS 32041200 DG Class 0
Synonyms 3',6'-Dihydroxy-3H-Spiro[Isobenzofuran-1,9'-Xanthen]-3-one, Disodium salt; Fluorescein Disodium; Disodium;3-Oxospiro[2-Benzofuran-1,9'-Xanthene]-3',6'-Diolate; C.I. 45350; Disodium 2-(3-oxo-6-Oxidoxanthen-9-yl)Benzoate; Uranine; Fluorescein Sodium Salt
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Properties

Summary

Formula
C20H10Na2O5
Molecular Mass
376.27000
Exact Mass
376.03200
PSA
81.65000
Logp
4.54220
IUPAC
disodium;3-oxospiro[2-benzofuran-1,9'-xanthene]-3',6'-diolate
SMILES
C1=CC=C2C(=C1)C(=O)OC23C4=C(C=C(C=C4)[O-])OC5=C3C=CC(=C5)[O-].[Na+].[Na+]

Attribute classification

Matter Classification
organic
Category
Dyestuffs and Pigments > Acid Dyes

Chemical and Physical Properties

Melting Point
320 °C
Density
1.601 g/cm3 (20ºC)
Boiling Point
620.8ºC at 760 mmHg
Flash Point
232.6ºC
Appearance
Rust-orange. Powder
Acidity and Basicity
alkalinity

Export information

HS Code
32041200
Export Rebate
0%
UN No.
0
DG-Class
0
Risk Code
36-36/37/38
Safety Label
Xi

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