caustic soda lye and hydrochloric acid , material , caustic soda lye: caustic soda lye as per is 252/1973 reaffirmed 1991, rayan grade, mercury free colourless 100% naoh basis (loading solution concentration is 48%) each tanker will be weighted in authorized weigh bridge. a quantity of 0.5% difference in weight and +0.5% unit difference in concentration of ordered quantity shall be accepted at the same price and terms and conditions. the supply may be effected after receiving the schedule from senior chemist/vgtps/rmd , hydrochloric acid i) hydrochloric acid confirming to is 265 1993 mercury free with solution concentration 30% - 33% ii) hydrochloric acid to be supplied should not be a by-product iii) hydrochloric acid to be supplied should be free from dirt and other impurities iv) the supply may be effected after receiving the schedule from senior chemist/vgtps/rmd