heavy chemicals procurement of heavy chemicals viz . , caustic soda lye ( 47 . 5percent ) , hydrochloric acid ( 30percent ) , liquid chlorine and aluminium sulphate for the year 2020-21 in segregated supply total qty as per nit , heavy chemicals , caustic soda lye ( pure grade ) as per is: 252/1993 with upto date amendment if any total alkalinity as naoh=47 . 5% . ( on 47 . 5% basis ) for ghtp =73mt , caustic soda lye ( pure grade ) as per is: 252/1993 with upto date amendment if any total alkalinity as naoh=47 . 5% . ( on 47 . 5% basis ) for ggsstp =40 mt , hydrochloric acid ( tech . grade ) as per is-265/1993 with upto date amendment , if any ( minimum 30% acidity as hcl by mass ) . for ghtp =244 mt , hydrochloric acid ( tech . grade ) as per is-265/1993 with upto date amendment , if any ( minimum 30% acidity as hcl by mass ) . for ggsstp =90 mt , liquid chlorine , technical grade conforming to is: 646/1986 ( amended upto date ) , conforming to code of safety is: 4243/1976 ( amended upto date ) . the material should be clear yellow liquid and when evaporated over a clean white tile should leave no residue . for ghtp =60 mt , aluminum sulphate ( non ferric ) in powderform . grade technical ( as per is-260/2001 as amended up to date ) packing: in powder form , packed in 40-50 kg . hdpe ( double polythenelinedhigh density ) new bags stitched with nylon thread . 1 ) alumina as a12o3 by weight as onreceived basis: 17% ( min . ) however the payment shall be made on prorate basis if a12o3% is in between 14-17% material below 14% a12o3 by weight shall not be accepted . 2 ) insoluble matter percent by weight: 0 . 3% ( max . ) 3 ) ph of 5% solution = 2 . 8 ( min ) +/- 5% variation allowed in quantity and shall be paid actually . for ggsstp =10 mt