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T1 Hexachlorocyclopentadiene Health and Safety Guide - Health and Safety Guide 63
A1 United Nations Environment Programme, 
A1 World Health Organization, 
A1 International Labour Organisation, 
K1 hydrocarbon
K1 toxic substance
K1 pollutant
K1 chemical
K1 health hazard
K1 waste disposal
SN 92 4 151063 3
YR 1991
FD 1991
LK https://wedocs.unep.org/handle/20.500.11822/29610
UL https://wedocs.unep.org/handle/20.500.11822/29610
NO Pure hexachiorocyclopentadiene (HEX) is a light, lemon-yellow liquid that has a pungent, musty odour. The odour threshold is reported to be 0.0014-0.0016 mg/m3. HEX is highly reactive and volatile at low temperatures. Commercially available HEX contains several impurities, depending on the method of synthesis.
DS UN Environment Document Repository
RD Sep 18, 2026