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2051-89-0

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Basic Information
CAS No.: 2051-89-0
Name: 4,4'-diamino[1,1'-biphenyl]-3-sulphonic acid
Molecular Structure:
Molecular Structure of 2051-89-0 (4,4'-diamino[1,1'-biphenyl]-3-sulphonic acid)
Formula: C12H12N2O3S
Molecular Weight: 264.305
Synonyms: Benzidine-3-sulphuric acid;4,4'-Diamino(1,1'-biphenyl)-3-sulphonic acid;BIPHENYL-3-SULFONIC ACID,4,4'-DIAMINO;4:4'-Diamino-3-diphenylyl hydrogen sulfate;(1,1'-Biphenyl)-3-sulfonic acid,4,4'-diamino;EINECS 218-132-4;4,4'-Diamino-biphenyl-3-sulfonsaeure;Benzidine,3-sulfo;4.4'-Diamino-diphenyl-sulfonsaeure-(3);benzidine-3-sulfonic acid;Benzidine-3-sulfuric acid;Benzidin-sulfonsaeure-(3);4.4'-Diamino-biphenyl-sulfonsaeure-(3);4,4'-diamino(1,1'-biphenyl)-3-sulfonic acid;4,4'-diamino-biphenyl-3-sulfonic acid;
Density: 1.451g/cm3
Boiling Point: °Cat760mmHg
Flash Point: °C
Safety: Questionable carcinogen with experimental tumorigenic data. See also SULFATES. When heated to decomposition it emits very toxic fumes of NOx and SOx.
PSA: 114.79000
LogP: 4.00790
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Chemistry

Molecular Structure of Benzidine-3-sulfuric acid (CAS NO. 2051-89-0):

IUPAC Name: 2-amino-5-(4-aminophenyl)benzenesulfonic acid
Empirical Formula: C12H12N2O3S 
Molecular Weight: 264.3003 
Index of Refraction: 1.683 
Surface Tension: 70.8 dyne/cm 
Density: 1.451 g/cm3  
Classification Code: Tumor data 

Consensus Reports

Reported in EPA TSCA Inventory.

Safety Profile

Questionable carcinogen with experimental tumorigenic data. See also SULFATES. When heated to decomposition it emits very toxic fumes of NOx and SOx.

Specification

 Benzidine-3-sulfuric acid ,its CAS number is 2051-89-0,it can be called 4,4'-Diamino(1,1'-biphenyl)-3-sulphonic acid and [1,1'-biphenyl]-3-sulfonic acid, 4,4'-diamino- .

 It is a high toxic substance,with flammability, burning will produce toxic fumes of nitrogen oxides and sulfur oxides,so it should be stored in cool and dry environment,seprated with food and materials.dry powder,foam,sand, carbon dioxide,water mist can be used if something urgent happened.