ChemicalBook > CAS DataBase List > Aniline-2-sulfonic acid

Aniline-2-sulfonic acid

Product Name
Aniline-2-sulfonic acid
CAS No.
88-21-1
Chemical Name
Aniline-2-sulfonic acid
Synonyms
o-Sulfanilic;Sulfoaniline;2-SULFOANILINE;Aniline-2-sulf;Orthoanilicacid;ORTHANILIC ACID;2-sulfanilicacid;SULPHANILIC ACID;O-SULFANILIC ACID;2-AminobenzenesuL
CBNumber
CB1484656
Molecular Formula
C6H7NO3S
Formula Weight
173.19
MOL File
88-21-1.mol
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Aniline-2-sulfonic acid Property

Melting point:
300 °C
Boiling point:
363.26℃[at 101 325 Pa]
Density 
1.342 (estimate)
vapor pressure 
0Pa at 25℃
refractive index 
1.5500 (estimate)
storage temp. 
Keep in dark place,Inert atmosphere,Room temperature
solubility 
3.565g/L in organic solvents at 20 ℃
form 
Crystalline Powder
pka
2.48(at 25℃)
color 
White to beige
Water Solubility 
sparingly soluble
Merck 
14,6882
BRN 
1309204
InChIKey
ZMCHBSMFKQYNKA-UHFFFAOYSA-N
LogP
0 at 23℃
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

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
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Hazard statements

H314Causes severe skin burns and eye damage

Precautionary statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P363Wash contaminated clothing before reuse.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
A86805
Product name
Aniline-2-sulfonic acid
Purity
95%
Packaging
100g
Price
$38.76
Updated
2024/03/01
TCI Chemical
Product number
A0266
Product name
2-Aminobenzenesulfonic Acid
Purity
>99.0%(HPLC)(T)
Packaging
25g
Price
$30
Updated
2024/03/01
TCI Chemical
Product number
A0266
Product name
2-Aminobenzenesulfonic Acid
Purity
>99.0%(HPLC)(T)
Packaging
100g
Price
$84
Updated
2024/03/01
Alfa Aesar
Product number
H31763
Product name
Orthanilic acid, 95%
Packaging
100g
Price
$52.65
Updated
2024/03/01
TRC
Product number
A622548
Product name
2-AminobenzenesulphonicAcid
Packaging
10g
Price
$85
Updated
2021/12/16
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Aniline-2-sulfonic acid Chemical Properties,Usage,Production

Chemical Properties

LIGHT BROWN FINE CRYSTALLINE POWDER

Definition

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

Production Methods

2-Aminobenzenesulfonic acid (Aniline-2-sulfonic acid) is obtained from 2-nitrothiophenol by boiling in a mixture of dioxane and water (ratio 20:1) for seven hours; the yield is 86.7% of theory. The acid can also be produced as follows: 2-chloronitrobenzene is reacted with sodium disulfide in aqueous alcoholic solution to form 2,2'-dinitrodiphenyl disulfide. After having been dissolved in a mixture of hydrochloric acid and nitric acid this is oxidized with chlorine to form 2-nitrobenze- nesulfonyl chloride, which is then hydrolyzed with soda solution and finally reduced with iron turnings. Alternatively 2,2'-dinitrodiphenyl disulfide can first be reduced to 2,2'- diaminodiphenyl disulfide and then oxidized with hydrogen peroxide in aqueous sulfuric acid to 2-aminobenzenesulfonic acid.
2,2'- Diamino-diphenyldisulfide can also be arrived at by alkaline hydrolysis of benzothiazole or mercaptobenzothiazole, followed by oxidation with hydrogen peroxide. The additional oxidation leading to 2-aminobenzenesulfonic acid can be performed in alkaline solution. Thus the synthesis starting from benzothiazole can be carried out exclusively in alkaline solution in a single reactor. Yield: 70%, based on benzothiazole.

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.

Flammability and Explosibility

Non flammable

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.]

Aniline-2-sulfonic acid Preparation Products And Raw materials

Raw materials

2-Nitrochlorobenzene

Preparation Products

REACTIVE RED 120 REACTIVE RED 194 Reactive Red 24 DIRECT RED 80 Reactive Red 15 Reactive Red 240 REACTIVE RED 4 Direct Blending Scarlet D-GLN
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View Lastest Price from Aniline-2-sulfonic acid manufacturers

Hebei Zhuanglai Chemical Trading Co.,Ltd
Product
Aniline-2-sulfonic acid 88-21-1
Price
US $70.00-25.00/kg
Min. Order
1kg
Purity
99%
Supply Ability
20ton
Release date
2024-06-05
Hebei Mujin Biotechnology Co.,Ltd
Product
Aniline-2-sulfonic acid 88-21-1
Price
US $0.00/KG
Min. Order
1KG
Purity
99%
Supply Ability
50000KG/month
Release date
2023-11-10
Hebei Weibang Biotechnology Co., Ltd
Product
Aniline-2-sulfonic acid 88-21-1
Price
US $0.00/KG
Min. Order
1KG
Purity
99%
Supply Ability
500000kg
Release date
2024-10-25

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