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2-Amino-1,4-benzenedisulfonic acid

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2-Amino-1,4-benzenedisulfonic acid Basic information

Product Name:
2-Amino-1,4-benzenedisulfonic acid
Synonyms:
  • JACS-98-44-2
  • 1,4-Benzenedisulfonic acid, 2-amino-
  • 2-amino-benzene-1,4-disulfonicacid
  • 2-Amino-p-benzenedislfonicacid
  • 2-amino-p-benzenedisulfonicaci
  • 4-Benzenedisulfonicacid,2-amino-1
  • kyselinaanilin-2,5-disulfonova
  • 2-aminobenzene-1,4-disulphonic acid
CAS:
98-44-2
MF:
C6H7NO6S2
MW:
253.25
EINECS:
202-669-6
Product Categories:
  • Intermediates of Dyes and Pigments
Mol File:
98-44-2.mol
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2-Amino-1,4-benzenedisulfonic acid Chemical Properties

Melting point:
>300°C
Boiling point:
497.5℃[at 101 325 Pa]
Density 
1.569 (estimate)
refractive index 
1.5500 (estimate)
storage temp. 
Keep in dark place,Inert atmosphere,Room temperature
solubility 
Aqueous Acid (Slightly), Water (Slightly)
form 
Solid
pka
-1.15±0.50(Predicted)
color 
White to Off-White
Water Solubility 
Slightly soluble in water.
LogP
-3.43 at 25℃
CAS DataBase Reference
98-44-2(CAS DataBase Reference)
EPA Substance Registry System
2-Amino-1,4-benzenedisulfonic acid (98-44-2)
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Safety Information

Risk Statements 
36/37/38-43
Safety Statements 
26-36/37/39-36/37
RTECS 
CZ9250000
TSCA 
Yes

MSDS

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2-Amino-1,4-benzenedisulfonic acid Usage And Synthesis

Chemical Properties

off-white powder

Uses

Aniline-2,5-disulfonic acid is used as pharmaceutical intermediate. 2-Amino-1,4-benzenedisulfonic acid is used as an intermediate for dyes; 2-Amino-1,4-benzenedisulfonic acid is converted to triazine derivatives, which are intermediates in the manufacture of dyes and optical brighteners.

Production Methods

2-Amino-1,4-benzenedisulfonic acid is obtained by sulfonating metanilic acid in 100% sulfuric acid with 50% oleum at 160 ℃ (5 – 6 h); the sulfonation mixture is diluted with water, lime is added, and the resulting calcium sulfate is removed; the product is then precipitated with excess concentrated hydrochloric acid in hot solution; yield 90 – 91%

2-Amino-1,4-benzenedisulfonic acid Preparation Products And Raw materials

Raw materials

Preparation Products

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