Melting point :-19 °C
Boiling point :210-220 °C(lit.)
Density :1.68
vapor pressure :0.2 mm Hg ( 20 °C)
refractive index :n20/D 1.555(lit.)
Flash point :210-220°C
storage temp. :+4°C
solubility :Soluble in ethanol and ether (U.S. EPA, 1985)
form :liquid, clear
Odor :faint turpentine odor
Water Solubility :(mg/L):
4.78 at 25 °C (shake flask-LSC, Banerjee et al., 1980)
4 at 20–25 °C (Geyer et al., 1980) Merck :14,4678
BRN :1766570
Henry's Law Constant :3.55, 5.87, 6.90, 10.5, and 15.3 at 2.0, 6.0, 10.0, 18.0, and 25.0 °C, respectively (EPICS-SPME, Dewulf et al., 1999)
Dielectric constant :2.6（Ambient）
Exposure limits :PC-TWA:0.2 mg/m3
Stability :Stable. Incompatible with rubber, oxidizing agents.
InChI :1S/C4Cl6/c5-1(3(7)8)2(6)4(9)10
InChIKey :RWNKSTSCBHKHTB-UHFFFAOYSA-N
SMILES :Cl\C(Cl)=C(Cl)/C(Cl)=C(\Cl)Cl
Surface tension :36mN/m at 20°C
CAS DataBase Reference :87-68-3(CAS DataBase Reference)
IARC :3 (Vol. 73) 1999
EPA Substance Registry System :Hexachlorobutadiene (87-68-3)

Symbol(GHS):
Signal word:	Warning
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501 H312 Harmful in contact with skin Acute toxicity,dermal Category 4 Warning P280,P302+P352, P312, P322, P363,P501 H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362 H317 May cause an allergic skin reaction Sensitisation, Skin Category 1 Warning P261, P272, P280, P302+P352,P333+P313, P321, P363, P501 H332 Harmful if inhaled Acute toxicity,inhalation Category 4 Warning P261, P271, P304+P340, P312 H400 Very toxic to aquatic life Hazardous to the aquatic environment, acute hazard Category 1 Warning P273, P391, P501
Precautionary statements:	P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P270 Do not eat, drink or smoke when using this product. P271 Use only outdoors or in a well-ventilated area. P272 Contaminated work clothing should not be allowed out of the workplace. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P301+P312 IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P302+P352 IF ON SKIN: wash with plenty of soap and water. P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. P312 Call a POISON CENTER or doctor/physician if you feel unwell. P330 Rinse mouth. P332+P313 IF SKIN irritation occurs: Get medical advice/attention. P333+P313 IF SKIN irritation or rash occurs: Get medical advice/attention. P391 Collect spillage. Hazardous to the aquatic environment P501 Dispose of contents/container to..…