procurement of heavy chemicals. procurement of heavy chemicals viz, caustic soda lye (47.5 per),hydrochloric acid, liquid chlorine, hydrazine hydrate ,trisodium phosphate and aluminium sulphate. , caustic soda lye 47.5% as per is-252/1993 (with amended up to date)min. total alkalinity 47.50% ± 0.2% naoh. material below 45% naoh shall not be accepted. however the payment shall be made on prorata basis if alkalinity is in the range of 45% to 47.5%.for ghtp , caustic soda lye 47.5%as per is-252/1993 (with amended up to date)min. total alkalinity 47.50% ± 0.2% naoh. material below 45% naoh shall not be accepted. however the payment shall be made on prorata basis if alkalinity is in the range of 45% to 47.5%. for ggsstp , hydrochloric acid 30%as per is-265/ 1993 (as amended up to date)minimum acidity 30% as hcl, by mass. material below 27% acidity shall not be accepted. however the payment shall be made on prorata basis if the acidity is in the range of 27-30%for ghtp , hydrochloric acid 30% as per is-265/ 1993 (as amended up to date)minimum acidity 30% as hcl, by mass. material below 27% acidity shall not be accepted. however the payment shall be made on prorata basis if the acidity is in the range of 27-30%. each consignment should be of approx.10mt only. for ggsstp , liquid chlorine technical grade as per is: 646/1986. material should be clear yellow and when evaporated over a clean white tile should leave no residue. for ghtp , liquid chlorinetechnical grade as per is: 646/1986. material should be clear yellow and when evaporated over a clean white tile should leave no residue.forggsstp , tri-sodium phosphateas per is-573/1985 (as amended up to date) packed in 50 kg. hdpe bags double scitchedwith nylon thread.1. phosphate as p2o by mass: min. 18.3% material below 17.5% phosphate shall not be accepted. however the payment shall be made on prorata basis if the purity is in between 17.5-18.3%.2. matter insoluble in water% by mass: max. 0.01%.3. soluble iron compound as fe% by mass: max. 0.01%.4. sulphate as so4% by mass: max. 0.01%.5. free sodium hydroxide as naoh% by mass: max. 2.5%. for ggsstp , aluminium sulphate (non-ferric).powder form grade technical (as per is-260/2001 as amended up to date) packing: in powder form, packed in 40-50 kg. hdpe (double polythene lined high density) new bags double stitched with nylon thread. 1) alumina as a12o3 percent by weight as on received 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. forggsstp