Tender Brief : Supply Of Caustic Soda Lye For Ptpp , Parichha , caustic soda lye ( naoh ) , percentage by mass 47% pure grade as per specification of is : 252 -1991 or latest amendment if any technical specification: % by mass 1-sodium carbonate ( as na2 co3 ) 0 . 40% ( max ) 2-sodium hydroxide as ( naoh ) 99 . 50% ( min ) 3-chloride ( as nacl ) 0 . 10% ( max ) 4-sulphate ( na2so4 ) 0 . 10% ( max ) 5-silicate ( assio2 ) 0 . 02% ( max ) 6-iron ( as fe ) ppmm , max 20 . 00 7-copper ( as cu ) ppmm max2 . 00 8-manganese ( as mn ) ppmm max1 . 00 9-matter insoluble in water :nil ) Read More