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HexachlorobenzeneEdit

Formula: C6Cl6Edit

Description: Hexachlorobenzene (HCB) has been used as a powerful chlorine donor  in colour compositions. It is soluble in diethyl ether, benzene, ethanol and chloroform. It can not serve as a binder.

Hazards: HCB is very toxic to aquatic organisms and it may cause long term adverse effects in the aquatic environment. Hexachlorobenzene has a half life in the soil of between 3 and 6 years. Biomagnification up the food chain does occur.

Sources: The use of HCB must be avoided.