chemical for boiler & cooling tower and boiler ( fire side ) , ( b ) boiler chemicals make- thermax, ion exchange / suzalchem / thermax or any approved make from competent authority. i.e. hsfcsm / nfcsm , hydrochloric acid ( hcl ) , castic soda ( naoh ) , sodium metabisulfite ( na2s, o5 ) smbs , morpholine ph booster ( c4h9no ) indion 1605 , ro anti- scalant indion 8211 , hydrazine ( n2h4 ) suchem bn-200 , tri sodium phosphate ( na3 po4 ) tsp ( na3 po4 ) indion 2574 suchem , low ph-ro cip chemical indion 9204 , high ph- ro cip chemical indion 9202 , boiler ph booster indian , sodium hypochlorite ( naocl ) , anti –scalent indion5621 , corrosion inhibitor ( indion 9087 ) , biocide phosphate base indion 1493 , bio-dispersant ( indion 9852 ) , sulfuric acid ( h2 so4 )