3,3'-Dichlorobenzidine

3,3'-Dichlorobenzidine
Names
	Preferred IUPAC name 3,3′-Dichloro[1,1′-biphenyl]-4,4′-diamine
	Other names 4-(4-Amino-3-chlorophenyl)-2-chloroaniline; 4,4′-Diamino-3,3′-dichlorobiphenyl; o,o'-Dichlorobenzidine; 3,3′-Dichlorobiphenyl-4,4′-diamine; 3,3′-Dichloro-4,4′-biphenyldiamine; 3,3′-Dichloro-4,4′-diaminobiphenyl
Identifiers
CAS Number	91-94-1 ;
3D model (JSmol)	Interactive image;
ChEMBL	ChEMBL314470 ;
ChemSpider	6803 ;
ECHA InfoCard	100.001.918
KEGG	C19225 ;
PubChem CID	7070;
UNII	1SDI2328UX ;
CompTox Dashboard (EPA)	DTXSID6020432 ;
	InChI InChI=1S/C12H10Cl2N2/c13-9-5-7(1-3-11(9)15)8-2-4-12(16)10(14)6-8/h1-6H,15-16H2 Key: HUWXDEQWWKGHRV-UHFFFAOYSA-N ; InChI=1/C12H10Cl2N2/c13-9-5-7(1-3-11(9)15)8-2-4-12(16)10(14)6-8/h1-6H,15-16H2 Key: HUWXDEQWWKGHRV-UHFFFAOYAF;
	SMILES Clc2cc(c1ccc(N)c(Cl)c1)ccc2N;
Properties
Chemical formula	C12H10Cl2N2
Molar mass	253.13 g/mol
Appearance	Gray or purple crystalline solid
Melting point	132 to 133 °C (270 to 271 °F; 405 to 406 K)
Boiling point	402 °C (756 °F; 675 K)
Solubility in water	0.07% (15°C)
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Potential carcinogen
	NIOSH (US health exposure limits):
PEL (Permissible)	carcinogen
REL (Recommended)	Ca
IDLH (Immediate danger)	Ca [N.D.]
	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

3,3'-Dichlorobenzidine is a chlorinated aromatic amine derived from benzidine. It is widely used in the production of diarylide yellow pigments used in the production of printing inks. Its use in the production of dyes has been largely discontinued because of concerns about carcinogenicity.