Hexachlorobutadiene

Hexachlorobutadiene
Names
	IUPAC name Hexachloro-1,3-butadiene
	Other names HCBD, HCDB, Perchlorobutadiene, perchloro-1,3-butadiene, tripen
Identifiers
CAS Number	87-68-3 ;
3D model (JSmol)	Interactive image;
ChEMBL	ChEMBL389950 ;
ChemSpider	6635 ;
ECHA InfoCard	100.001.605
KEGG	C11091 ;
PubChem CID	6901;
UNII	CQ8AAO9MO1 ;
CompTox Dashboard (EPA)	DTXSID7020683 ;
	InChI InChI=1S/C4Cl6/c5-1(3(7)8)2(6)4(9)10 Key: RWNKSTSCBHKHTB-UHFFFAOYSA-N ; InChI=1/C4Cl6/c5-1(3(7)8)2(6)4(9)10 Key: RWNKSTSCBHKHTB-UHFFFAOYAT;
	SMILES Cl/C(Cl)=C(\Cl)C(\Cl)=C(/Cl)Cl;
Properties
Chemical formula	C4Cl6
Molar mass	260.74 g·mol−1
Appearance	Colorless liquid
Odor	Mild, turpentine-like
Density	1.665 g/mL at 25 °C
Melting point	−22 – −19 °C (−8 – −2 °F; 251–254 K)
Boiling point	210–220 °C (410–428 °F; 483–493 K)
Solubility in water	Insoluble
Vapor pressure	0.2 mmHg (20 °C)
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	carcinogen
	NIOSH (US health exposure limits):
PEL (Permissible)	none
REL (Recommended)	Ca TWA 0.02 ppm (0.24 mg/m3) [skin]
IDLH (Immediate danger)	Ca [N.D.]
Safety data sheet (SDS)	Sigma Aldrich
Hazards
NFPA 704 (fire diamond)	3 1 0
	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

Hexachlorobutadiene, (often abbreviated as "HCBD") Cl₂C=C(Cl)C(Cl)=CCl₂, is a colorless liquid at room temperature that has an odor similar to that of turpentine. It is a chlorinated aliphatic diene with niche applications but is most commonly used as a solvent for other chlorine-containing compounds. Structurally, it has a 1,3-butadiene core, but fully substituted with chlorine atoms.