pyrotechnics-revived/chapters/99-1-chemical-hexachloroben...

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## Hexachlorobenzene
**Formula**
$C6Cl6$
**Pyrotechnics use**
Chlorine donor
**Synonyms**
HCB
**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.
**Sources**
The use of HCB must be avoided.
**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.