(a)Workers engaged in the manufacture, processing, formulation or use of the following , shall be examined once in three months by the Certifying Surgeon and records maintained:-(i)Hexa-ethyl tetra phosphate.(ii)Tetra ethyl pyrophosphate.(iii)O.O.Diethyl O.P.nitrophenyl thiophosphate(parathion)(iv)Nicotine, Nicotine sulphate.(v)Mercury derivatives.(vi)Methyl bromide.(vii)Cyanides.(viii)Arsenical derivatives.(ix)Chrome Process compounds.(x)Nitro or amino process compounds.
