Benzidine

Benzidine
Names
	Preferred IUPAC name [1,1′-Biphenyl]-4,4′-diamine
	Other names Benzidine, di-phenylamine, diphenylamine, 4,4'-bianiline, 4,4'-biphenyldiamine, 1,1'-biphenyl-4,4'-diamine, 4,4'-diaminobiphenyl, p-diaminodiphenyl, p-benzidine
Identifiers
CAS Number	92-87-5 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:80495 ;
ChEMBL	ChEMBL15901 ;
ChemSpider	6844 ;
ECHA InfoCard	100.002.000
EC Number	202-199-1;
KEGG	C16444 ;
PubChem CID	7111;
RTECS number	DC9625000;
UNII	2X02101HVF ;
UN number	1885
CompTox Dashboard (EPA)	DTXSID2020137 ;
	InChI InChI=1S/C12H12N2/c13-11-5-1-9(2-6-11)10-3-7-12(14)8-4-10/h1-8H,13-14H2 Key: HFACYLZERDEVSX-UHFFFAOYSA-N ; InChI=1/C12H12N2/c13-11-5-1-9(2-6-11)10-3-7-12(14)8-4-10/h1-8H,13-14H2 Key: HFACYLZERDEVSX-UHFFFAOYAX;
	SMILES c2c(c1ccc(N)cc1)ccc(N)c2;
Properties
Chemical formula	C12H12N2
Molar mass	184.24 g/mol
Appearance	Grayish-yellow, reddish-gray, or white crystalline powder
Density	1.25 g/cm3
Melting point	122 to 125 °C (252 to 257 °F; 395 to 398 K)
Boiling point	400 °C (752 °F; 673 K)
Solubility in water	0.94 g/100 mL at 100 °C
Magnetic susceptibility (χ)	−110.9·10−6 cm3/mol
Related compounds
Related compounds	biphenyl
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	carcinogenic
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H302, H350, H410
Precautionary statements	P201, P202, P264, P270, P273, P281, P301+P312, P308+P313, P330, P391, P405, P501
	NIOSH (US health exposure limits):
PEL (Permissible)	occupational carcinogen
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Benzidine (trivial name), also called 1,1'-biphenyl-4,4'-diamine (systematic name), is an organic compound with the formula (C₆H₄NH₂)₂. It is an aromatic amine. It is a component of a test for cyanide. Related derivatives are used in the production of dyes. Benzidine has been linked to bladder and pancreatic cancer.