bids are invited for phenolphthalein indicator - ar ( analytical reagent ) grade or equivalent , hexane - ar ( analytical reagent ) grade or equivalent , hexamethylene tetramine - ar ( analytical reagent ) grade or equivalent , hydrazine sulphate powder - ar ( analytical reagent ) grade or equivalent , mercuric sulfate:hgso4, crystal or powder. - ar ( analytical reagent ) grade or equivalent , spands ( sodium 2- ( parasulphophenylazo ) -1, 8-dihydoxy- 3, 6-naphthalene disulphonate ) reagent - ar ( analytical reagent ) grade or equivalent , 1, 5 diphenylcarbazide - ar ( analytical reagent ) grade or equivalent , potash alum ( aluminium potassium sulphate alk ( so4 ) 2.12h2o ) - ar ( analytical reagent ) grade or equivalent , potassium iodide crystals - ar ( analytical reagent ) grade or equivalent , methyl red - ar ( analytical reagent ) grade or equivalent , bromocresol green - ar ( analytical reagent ) grade or equivalent , 95 percent ethyl alcohol ( ethanol ) . - ar ( analytical reagent ) grade or equivalent , calcium hypochlorite ( bleaching powder ) - ar ( analytical reagent ) grade or equivalent , phenol - ar ( analytical reagent ) grade or equivalent , sodium borohydride - ar ( analytical reagent ) grade or equivalent , glucose ( dextrose ) - ar ( analytical reagent ) grade or equivalent , glutamic acid - ar ( analytical reagent ) grade or equivalent , potassium iodide ( ki ) powder - ar ( analytical reagent ) grade or equivalent , curcumin - ar ( analytical reagent ) grade or equivalent , carminic acid - ar ( analytical reagent ) grade or equivalent , solid sodium chloride - ar ( analytical reagent ) grade or equivalent , calcium carbonate - ar ( analytical reagent ) grade or equivalent , potassium chromate - ar ( analytical reagent ) grade or equivalent , cobalt nitrate ( co ( no3 ) 2 ) - ar ( analytical reagent ) grade or equivalent , ammonium sulfate - ar ( analytical reagent ) grade or equivalent , nitric acid - ar ( analytical reagent ) grade or equivalent , anhydrous potassium nitrate - ar ( analytical reagent ) grade or equivalent , ammonium hydroxide nh4oh - ar ( analytical reagent ) grade or equivalent , magnesium chloride, mgcl2. 6 h2o - ar ( analytical reagent ) grade or equivalent , sodium acetate, ch3coona, 3 h2o - ar ( analytical reagent ) grade or equivalent , acetic acidch3cooh ( 99% ) , - ar ( analytical reagent ) grade or equivalent , anhydrous sodium sulfate na2 so4 - ar ( analytical reagent ) grade or equivalent , barium chloride: bacl 2 crystals 20to 30 mesh - ar ( analytical reagent ) grade or equivalent , hydroxylamine hydrochloride ( nh2oh hcl ) - ar ( analytical reagent ) grade or equivalent , sodium sulfide na2s.9 h2o - ar ( analytical reagent ) grade or equivalent , sodium tetra borate na2 b4o7.10 h2o - ar ( analytical reagent ) grade or equivalent total quantity : 1