2,2'-Benzidinedisulfonic acid Chemical Properties

Melting point:

175°C

Boiling point:

638.25℃[at 101 325 Pa]

Density 

1.5417 (rough estimate)

vapor pressure 

0Pa at 25℃

refractive index 

1.6510 (estimate)

storage temp. 

Keep in dark place,Inert atmosphere,Room temperature

form 

Powder

pka

-1.85±0.50(Predicted)

color 

Dark purple

Water Solubility 

<0.1 g/100 mL at 20 ºC

LogP

1.102 at 24℃

CAS DataBase Reference

117-61-3(CAS DataBase Reference)

EPA Substance Registry System

[1,1'-Biphenyl]-2,2'-disulfonic acid, 4,4'-diamino- (117-61-3)

Safety Information

Hazard Codes 

Xi

Risk Statements 

20/21/22-37/38-36-36/37/38

Safety Statements 

22-26-36-60-37

RTECS 

DV5230000

TSCA 

Yes

HS Code 

29215900

Toxicity

eye-rbt 500 mg/24H SEV 28ZPAK -,191,72

MSDS

• Language:English Provider:2,2'-Benzidinedisulfonic acid
• Language:English Provider:ALFA

2,2'-Benzidinedisulfonic acid Usage And Synthesis

Chemical Properties

PURPLE CRYSTALLINE POWDER

Uses

4,4'-Diaminobiphenyl-2,2'-disulfonic acid hydrate is an important raw material and intermediate used in Organic Synthesis, Pharmaceuticals, Agrochemicals and Dyestuff. Benzidine-2,2' -disulfonic acid is used in the production of yellow and red azo dyes.

Production Methods

2,2'-Benzidinedisulfonic acid is made from the potassium or sodium salt of 3- nitrobenzenesulfonic acid by a gradual reduction using zinc dust and sodium hydroxide solution in a dilute aqueous solution. The product is subsequently rearranged using hydrochloric acid or dilute sulfuric acid. Electrochemical or catalytic reductions are also possible.

General Description

Leaflets or prisms or light purple powder.

Air & Water Reactions

Insoluble in water.

Fire Hazard

Flash point data for 2,2'-Benzidinedisulfonic acid are not available; however, 2,2'-Benzidinedisulfonic acid is probably combustible.

Flammability and Explosibility

Non flammable

Safety Profile

A severe eye irritant. When heated to decomposition it emitsvery toxic fumes of SOx and NOx.

2,2'-Benzidinedisulfonic acid(117-61-3)Related Product Information

• Sulfurous Acid
• IMINOCTADINE TRIS(ALBESILATE)
• Benzidine
• ACID RED 89
• O-TOLUIDINE DISULFONIC ACID
• 3,3'-DIMETHYL-NAPHTHIDINE-DISULFONIC ACID
• Acid Yellow 42
• ACID RED 97 (C.I. 22890)
• 4,4'-DIAMINO-5,5'-DIMETHYL-2,2'-BIPHENYL DISULFONIC ACID DISODIUM SALT
• Mordant Yellow 26
• Acid Yellow 44
• Acid Orange 56
• 2,2'-Benzidinedisulfonic acid