bids are invited for purchase of chemicals for laboratory mannitol , yeast extract powder , potassium hydrogen phosphate , magnesium sulphate , sodium chloride , congo red powder , potassium sulphate , calcium sulphate , copper sulphate , zinc sulphate , ammonium molybdate , boric acid , ferrous sulphate , citric acid , sucrose , ferric sulphate , calcium carbonate , zinc granules , methyl red indicater , methyl blue indicater , dl-malic acid , calcium chloride , feedta , vitamin biotin , potassium hydroxide koh , btb powder bromothayamol blue , pyridoxine , sodium molybdate , manganese sulfate , d glucose , tri calcium phosphate , ammonium sulphate , peptone , potassium mineral mica powder , zinc oxide , potassium di hydrogen ortho phosphate , ferric chloride , bromorcesol purple , agar agar powder , ethanol , oxalic acid , potassium chloride , ph buffer solution , selenium dust , potassium aluminium silicate total quantity : 58