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4-Aminobenzene-1,3-Disulfonic Acid

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4-Aminobenzene-1,3-Disulfonic Acid / CAS : 137-51-9

Appearance White to gray needle shaped crystals, with a melting point of 120 ℃ for dihydrate, soluble in alcohol and water, and decomposed at temperatures higher than 120 ℃. UN 3439
HS 29214990 DG Class 6.1
Synonyms Aniline-2,4-DSA;; 4-Aminobenzene-1,3-Disulphonic Acid; 1,3-Benzenedisulfonic Acid, 4-Amino-; Aniline-2,4-Disulfonic Acid; 4-Amino-1,3-Benzenedisulfonic Acid; Aniline-2,4-Disulphonic Acid; 4-Azanylbenzene-1,3-Disulfonic Acid; 3-Benzenedisulfonicacid,4-Amino-1; 4-Amino-3-Benzenedisulfonicacid
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Properties

Summary

Formula
C6H7NO6S2
Molecular Mass
253.25300
Exact Mass
252.97100
PSA
151.52000
Logp
2.50500
IUPAC
4-aminobenzene-1,3-disulfonic acid
SMILES
C1=CC(=C(C=C1S(=O)(=O)O)S(=O)(=O)O)N

Attribute classification

Matter Classification
organic
Category
Dyestuffs and Pigments > Intermediates

Chemical and Physical Properties

Melting Point
>259°C (dec.)
Density
1.844±0.06 g/cm3(Predicted)
Boiling Point
497.45℃[at 101 325 Pa]
Appearance
White to gray needle shaped crystals, with a melting point of 120 ℃ for dihydrate, soluble in alcohol and water, and decomposed at temperatures higher than 120 ℃.

Export information

HS Code
29214990
Export Rebate
13%
UN No.
3439
DG-Class
6.1
Risk Code
R20/21/22
Safety Label
Xn

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