bids are invited for chemicals toluene , petroleum ether 60-80 , chloroform , benzene , ammonia , methanol hplc grade , acetone , ethyl acetate for hplc grade , sodium potassium tartrate , copper sulphate pentahydrate , phenolphthalein powder , zinc chloride , sodium hydroxide , potassium dichromate , potassium hydroxide , sodium chloride , chromotropic acid disodium salt , ferric chloride , carbon tetrachloride , silver nitrate , glycerol , urea , potassium permanganate , sodium disulphite , ferrous sulphate , sodium meta bisulphite , potassium iodide , acetonitrile hplc grade , isopropyl alcohol , cetylpyridinium chloride , dibasic potassium phosphate , erichrome black t indicator , nitric acid , ammonium dihydrogen orthophosphate , hydroxy naptholblue , ph buffer capsule tablet ph 4.0 , ph buffer capsule tablet ph 7.0 , ph buffer capsule tablet ph 9.0 , rapid hicoliform tm broth total quantity : 93