procurement of heavy chemicals viz, caustic soda ( 47.5 percent ) , hydrochloric acid ( 30 percent ) , liquid chlorine. procurement of heavy chemicals viz, caustic soda ( 47.5 percent ) , hydrochloric acid ( 30 percent ) , liquid chlorine, quantity as per nit. , 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%. 60 mt ( on 47.5% basis ) or 28.5 mt ( on 100% basis ) 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%. 70 mt ( on 47.5% basis ) or 33.25 mt ( on 100% basis ) 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% 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