Termite Control Chemicals under ISI specification for Pre and Post construction Anti termite treatments (IS:6313 part 2 and 3) . Those three listed termiticides are.The recommended emulsion concentration by weight for first two chemicals i.e Clorpyrifos 20% EC and Lindane 20% EC is 1.0 % which means that 1 Lit. of these chemical has to be mixed with 19 liters of water.