RT Report T1 Hexachlorobenzene Health and Safety Guide - Health and Safety Guide 107 A1 World Health Organization, K1 health K1 benzene K1 guideline K1 chemical safety SN 92 4 151107 9 YR 1998 FD 1998 LK https://wedocs.unep.org/handle/20.500.11822/29642 UL https://wedocs.unep.org/handle/20.500.11822/29642 NO At ambient temperature, HCB is a white crystalline solid. Technical grade HCB is available as a wettable powder, liquid or dust. It is virtually insoluble in water, but is soluble in ether, benzene, chloroform and hot ethanol. HCB has a high octanol/water partition coefficient, low vapour pressure and low flammability. DS UN Environment Document Repository RD Sep 20, 2026