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Polychlorinated Biphenyls (PCBs) and Polychlorinated Terphenyls (PCTs) Health and Safety Guide 68
The PCBs are chlorinated hydrocarbons that are manufactured commercially by the progressive chlorination of biphenyl in the presence of a suitable catalyst (e.g., iron chloride). Depending on the reaction conditions, the ...
Hexachlorocyclopentadiene Health and Safety Guide - Health and Safety Guide 63
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. ...
Nickel, Nickel Carbonyl, and some Nickel Compounds Health and Safety Guide 62
Nickel is a naturally occurring, shiny, light-coloured metal with high electrical and thermal conductivities. It is resistant to corrosion by air, water, and alkalis, but reacts with dilute oxidizing agents.