Melting point :156-161 °C(lit.)
Boiling point :373.64°C (rough estimate)
Density :1.9 g/cm³
vapor pressure :173 at 25 °C (subcooled liquid vapor pressure calculated from GC retention time data, Hinckley etal., 1990)
refractive index :1.60-1.626 (589.3 nm 20℃)
Flash point :11 °C
storage temp. :APPROX 4°C
solubility :Soluble in ethanol, benzene, chloroform (Weast, 1986), cod liver oil, and octanol (Montgomery, 1993)
form :Solid
color :White
Water Solubility :2mg/L(25 ºC)
BRN :7073451
Henry's Law Constant :0.888 at 5 °C, 1.58 at 15 °C, 2.27 at 20 °C, 2.96 at 25 °C, 6.02 at 35 °C:in 3% NaCl solution: 1.48 at 5 °C, 2.76 at 15 °C, 5.23 at 25 °C, 7.20 at 35 °C (gas stripping-GC, Cetin et al., 2006)
Stability :Stable. Incompatible with strong oxidizing agents.
EPA Substance Registry System :.alpha.-Hexachlorocyclohexane (319-84-6)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H301 Toxic if swalloed Acute toxicity,oral Category 3 Danger P264, P270, P301+P310, P321, P330,P405, P501 H312 Harmful in contact with skin Acute toxicity,dermal Category 4 Warning P280,P302+P352, P312, P322, P363,P501 H351 Suspected of causing cancer Carcinogenicity Category 2 Warning P201, P202, P281, P308+P313, P405,P501 H410 Very toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 1 Warning P273, P391, P501
Precautionary statements:	P202 Do not handle until all safety precautions have been read and understood. P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P301+P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.