purchase of boiler, wtp and cooling tower chemicals , oxygen scvanger indion-1520 (for 110 kg/cm2 pressure @540 oc tempboiler) make- ion exchange/nalco , tri-sodium phosphate, indion-2574 (for 110 kg/cm2 pressure @540 oc tempboiler) make- ion exchange/nalco , ph booster, indion-1605 , ro antiscalent , indion-8211 make- ion exchange/nalco , non- oxidizin bioside , indion-9087,make- ion exchange/nalco , oxidizin bioside, indion-1493 , make- ion exchange/nalco , bio- dispercent, indion-9852, make- ion exchange/nalco , corrision inbitor & antiscalent, indion-5621, make- ion exchange/nalco , resin 220 na, make- ion exchange/nalco , resin 225 h, make- ion exchange/nalco , resin ffip, make- ion exchange/nalco