3,3'-DIAMINOBENZIDINE

PRODUCT IDENTIFICATION
CAS NO. 91-95-2 (parent)
868272-85-9 (Tetrahydrochloride hydrate)

3,3'-DIAMINOBENZIDINE

EINECS NO. 202-110-6
FORMULA (NH2)2C6H3C6H3(NH2)2
MOL WT. 214.27

H.S. CODE

 2921.59.4000

TOXICITY

  
SYNONYMS 3,3',4,4'-Tetraaminobiphenyl; 3,3',4,4'-Tetraaminodiphenyl; DAB;
(1,1'-Biphenyl)-3,3',4,4'-tetramine; 3,3'4,4'-Biphenyltetramine; Biphenyl-3,3',4,4'-tetrayltetraamine; 3,3'-Diaminobenzidene;
SMILES

c1(c2cc(c(N)cc2)N)cc(c(N)cc1)N

CLASSIFICATION

Stain, Dye, Aniline, Biphenyl

EXTRA NOTES

A precursor to polybenzimidazole fiber.

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE Brownish powder

MELTING POINT

 173 - 178 C
BOILING POINT  
SPECIFIC GRAVITY  

SOLUBILITY IN WATER

 0.55 g/l at 20 C, 25 g/l at 95 C
pH

 

VISCOSITY  
AUTOIGNITION

 

REFRACTIVE INDEX

 
NFPA RATINGS Health: 2; Flammability: 1; Reactivity: 2
FLASH POINT

> 200 C

STABILITY Stable under normal conditions.

EXTERNAL LINKS & GENERAL DESCRIPTION

USA.gov - 3,3'-Diaminobenzidine

Wikipedia Linking - 3,3'-Diaminobenzidine

Google Scholar Search - 3,3'-Diaminobenzidine

U.S. National Library of Medicine - 3,3'-Diaminobenzidine

PubChem Compound Summary - 3,3'-Diaminobenzidine

KEGG (Kyoto Encyclopedia of Genes and Genomes) -  3,3'-Diaminobenzidine

ChEBI (http://www.ebi.ac.uk/chebi/) -  3,3'-Diaminobenzidine

NCBI (http://www.ncbi.nlm.nih.gov/) -  3,3'-Diaminobenzidine

Material Safety Data Sheet - 3,3'-Diaminobenzidine

EPA - Substance Registry Services - 3,3'-Diaminobenzidine

Local:
Benzidine is the trival name for 4,4'-diaminobiphenyl which two hydrogen atoms on biphenyl molecules are replaced by amines at para position each. It is a white to slightly reddish crystalline powder turns dark on exposure to air and light; melting point of 128 C. This compound decomposes on heating and reacts violently with strong oxidants, particularly nitric acid. It is produced by the action of acids on diphenyldrazine. Benzidine can be classified as arylamine which one or more of the hydrogen atoms are replaced by aromatic groups such as homologues of aniline, p-aminobiphenyl, benzidine, and naphthylamine. Some arylamines are carcinogenic and the uses are restricted. Benzidne forms a blue precipitate with hemoglobin. Hemoglobin catalyzes the oxidation of benzidine to a polymer by hydrogen peroxide, which gives the blue color. This was the common screening test for occult blood. But the use is restricted due to cancer suspect. Benzidine is the starting material in the dye manufacturing. Numerous substituted group on the benzidine ring system as well as amine groups offer important roles to each characteristic colours directly and in preparing next target colorants. It is important in azo dyes production due to strong fix to cotton. It and its derivatives have active applications in the synthesis of dyes, pigments, paints, rubber compounding agents and wide range of organic chemicals.  Biphenyl structure of benzidine also provide the application in luminescence chemistry, spectrophotometric analysis, molecular chemistry, and as a stating material for organometallic-complexes. Benzidine molecules are used in dye production industry and certain other industrial fields. Benzidine molecules include:

SALES SPECIFICATION

APPEARANCE

 brownish powder

CONTENT

97.0% min

MELTING POINT

173 ~ 178 C

TRANSPORTATION
PACKING  
HAZARD CLASS  
UN NO.  
SAFETY INFORMATION

HAZARD OVERVIEW

GHS (Globally Harmonised System) Classification: Germ cell mutagenicity. Carcinogenicity. Hazard statements: Obtain special instructions before use. Use personal protective equipment as required. IF exposed or concerned: Get medical advice/ attention. Suspected of causing genetic defects. May cause cancer.

GHS

 

SIGNAL WORD Danger

PICTOGRAMS

HAZARD STATEMENTS

H315-H319-H335-H341-H350

P STATEMENTS

P201-P281-P308 + P313

EC DIRECTIVES

 

HAZARD CODES

RISK PHRASES

45-68

SAFETY PHRASES

53-45

PRICE INFORMATION