centralized rate contract of cooling water treatment chemicals for ntpc stations for the year 2022-23 , barauni-soln:non oxidising biocide:25-40% , barh-phosphono butane tricarboxylic acid ( pbtc ) , barh-hedp grade-tr , barh-soln:bio-dispersant , bongaiagaon-hedp grade-tr , bongaiagaon-soln:bio-dispersant , bongaiagaon-soln:non oxidising biocide:25-40% , dadri-phosphono butane tricarboxylic acid ( pbtc ) , dadri-hedp grade-tr , dadri-soln:bio-dispersant , dadri-co-polymer dispersant:active content-50% , darlipalli-phosphono butane tricarboxylic acid ( pbtc ) , darlipalli-soln:polyacrylamide-dispersant:indl gr , darlipalli-soln:bio-dispersant , darlipalli-ter-polymer dispersant-technical grade , darlipalli-soln:non oxidising biocide:25-40% , farakka-phosphono butane tricarboxylic acid ( pbtc ) , farakka-hedp grade-tr , farakka-soln:polyacrylamide-dispersant:indl gr , farakka-soln:bio-dispersant , farakka-ter-polymer dispersant-technical grade , faridabad-phosphono butane tricarboxylic acid ( pbtc ) , faridabad-hedp grade-tr , faridabad-soln:polyacrylamide-dispersant:indl gr , faridabad-soln:bio-dispersant , gadarwara-phosphono butane tricarboxylic acid ( pbtc ) , gadarwara-soln:bio-dispersant , gadarwara-co-polymer dispersant:active content-50% , jhanor-phosphono butane tricarboxylic acid ( pbtc ) , jhanor-soln:bio-dispersant , jhanor-co-polymer dispersant:active content-50% , kahalgaon-phosphono butane tricarboxylic acid ( pbtc ) , kahalgaon-soln:polyacrylamide-dispersant:indl gr , kahalgaon-soln:bio-dispersant , kahalgaon-ter-polymer dispersant-technical grade , kahalgaon-benzortriazole ( bta ) , kawas-phosphono butane tricarboxylic acid ( pbtc ) , kawas-hedp grade-tr , kawas-soln:polyacrylamide-dispersant:indl gr , kawas-soln:bio-dispersant , kawas-ter-polymer dispersant-technical grade , khargone-phosphono butane tricarboxylic acid ( pbtc ) , khargone-hedp grade-tr , khargone-soln:bio-dispersant , khargone-ter-polymer dispersant-technical grade , khargone-co-polymer dispersant:active content-50% , korba-phosphono butane tricarboxylic acid ( pbtc ) , korba-soln:polyacrylamide-dispersant:indl gr , korba-soln:bio-dispersant , korba-ter-polymer dispersant-technical grade , kudgi-phosphono butane tricarboxylic acid ( pbtc ) , kudgi-hedp grade-tr , kudgi-soln:bio-dispersant , kudgi-ter-polymer dispersant-technical grade , lara-phosphono butane tricarboxylic acid ( pbtc ) , lara-soln:bio-dispersant , lara-ter-polymer dispersant-technical grade , lara-co-polymer dispersant:active content-50% , mouda-phosphono butane tricarboxylic acid ( pbtc ) , mouda-soln:bio-dispersant , mouda-ter-polymer dispersant-technical grade , mouda-co-polymer dispersant:active content-50% , ramagundam-phosphono butane tricarboxylic acid ( pbtc ) , ramagundam-soln:bio-dispersant , ramagundam-co-polymer dispersant:active content-50% , ramagundam-benzortriazole ( bta ) , rihand-phosphono butane tricarboxylic acid ( pbtc ) , rihand-hedp grade-tr , rihand-soln:polyacrylamide-dispersant:indl gr , rihand-soln:bio-dispersant , rihand-ter-polymer dispersant-technical grade , rihand-co-polymer dispersant:active content-50% , simhadri-hedp grade-tr , simhadri-soln:polyacrylamide-dispersant:indl gr , simhadri-soln:bio-dispersant , simhadri-soln:non oxidising biocide:25-40% , sipat-phosphono butane tricarboxylic acid ( pbtc ) , sipat-soln:polyacrylamide-dispersant:indl gr , sipat-soln:bio-dispersant , solapur-phosphono butane tricarboxylic acid ( pbtc ) , solapur-hedp grade-tr , solapur-soln:bio-dispersant , solapur-ter-polymer dispersant-technical grade , solapur-co-polymer dispersant:active content-50% , tanda-phosphono butane tricarboxylic acid ( pbtc ) , tanda-hedp grade-tr , tanda-soln:polyacrylamide-dispersant:indl gr , tanda-soln:bio-dispersant , tanda-benzortriazole ( bta ) , tstps_kaniha-phosphono butane tricarboxylic acid ( pbtc ) , tstps_kaniha-hedp grade-tr , tstps_kaniha-soln:bio-dispersant , tstps_kaniha-ter-polymer dispersant-technical grade , unchahar-phosphono butane tricarboxylic acid ( pbtc ) , unchahar-soln:bio-dispersant , unchahar-co-polymer dispersant:active content-50% , vindhyachal-phosphono butane tricarboxylic acid ( pbtc ) , vindhyachal-soln:bio-dispersant , vindhyachal-ter-polymer dispersant-technical grade , vindhyachal-co-polymer dispersant:active content-50% => limited