procurement of chemicals purchase of chemicals , procurement of chemicals , acetone , acetonitrile , carbon tetra chloride , acetic acid , hplc water , 1 , 4 dioxane , diethylene glycol , potassium iodide , ortho phosphoric acid , hydrochloric acid , sulphuric acid , carbon di sulphide , potassium iodate , ammonium ferric sulphate , dibutyl phthalate , 1 , 2 , dichloro benzene , perchloric acid , sodium hydroxide pellets , nitric acid , dichloro methane , ferrous sulphate , potassium dihydrogen phosphate , diallyl phthalate , benzanilide , methanol , ferric chloride , thymol blue indicator , triethanol amine , acenaphthene , potassium hydroxide pellets , nitro benzene , sodium sulphite , potassium hydrogen phthalate , sodium carbonate , buffer solution