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Aniline-2-sulfonic acid

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Aniline-2-sulfonic acid Basic information

Product Name:
Aniline-2-sulfonic acid
Synonyms:
  • 2-amino-1-benzenesulfonic acid
  • 2-SULFOANILINE
  • 2-AMINOBENZENESULFONIC ACID
  • ANILINE-2-SULFONIC ACID
  • ANILINE-O-SULFONIC ACID
  • 2-aminobenzenesulphonic acid
  • ORTHO AMINO PHENOL SULPHONIC
  • ORTHANILIC ACID (2-AMINOBENZENESULFONIC ACID)
CAS:
88-21-1
MF:
C6H7NO3S
MW:
173.19
EINECS:
201-810-9
Product Categories:
  • Intermediates of Dyes and Pigments
Mol File:
88-21-1.mol
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Aniline-2-sulfonic acid Chemical Properties

Melting point:
300 °C
Density 
1.342 (estimate)
refractive index 
1.5500 (estimate)
pka
2.48(at 25℃)
form 
Crystalline Powder
color 
White to beige
Water Solubility 
sparingly soluble
Merck 
14,6882
BRN 
1309204
InChIKey
ZMCHBSMFKQYNKA-UHFFFAOYSA-N
CAS DataBase Reference
88-21-1(CAS DataBase Reference)
NIST Chemistry Reference
Aniline-o-sulfonic acid(88-21-1)
EPA Substance Registry System
o-Aminobenzenesulfonic acid (88-21-1)
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Safety Information

Hazard Codes 
C
Risk Statements 
34
Safety Statements 
26-36/37/39-45-28A
RIDADR 
UN 2585 8/PG 3
WGK Germany 
3
RTECS 
DB4727700
TSCA 
Yes
HazardClass 
8
PackingGroup 
III
HS Code 
29214200

MSDS

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Aniline-2-sulfonic acid Usage And Synthesis

Chemical Properties

LIGHT BROWN FINE CRYSTALLINE POWDER

Definition

ChEBI: An aminobenzenesulfonic acid carrying an amino group at position 2.

General Description

Light brown powder.

Air & Water Reactions

Soluble in water.

Reactivity Profile

Aniline-2-sulfonic acid is an amino acid. Reacts weakly with both acids and bases.

Fire Hazard

Flash point data for Aniline-2-sulfonic acid are not available, however Aniline-2-sulfonic acid is probably combustible.

Purification Methods

Crystallise orthanilic acis from aqueous solution, containing 20mL of conc HCl per L, then crystallise it from distilled water, and dry it in a vacuum desiccator over Sicapent (m 315o). When an aqueous solution is chilled below 13.5o, the hydrated form of the acid is obtained. It is used for the determination of nitrite and nitrate. The S-benzylisothiuronium salt has m 137o (from H2O). [Wertheim Org Synth Coll Vol II 471 1943, Beilstein 14 H 681, 14 I 714, 14 II 429, 14 III 1896, 14 IV 2638.]

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