bids are invited for chemicals for environmental engineering laboratory ph buffer capsules ph 4.0 , ph buffer capsules ph 7.0 , ph buffer capsules ph 9.2 , potassium chloride , edta disodium salt , eriochrome black t , magnesium chroride , ammonium chloride , ammonia solution , phenolphthalein indicator , methyl orange indicator , conc. sulfuric acid , silver nitrate , potassium chromate , sodium chloride , sodium hydroxide , manganese sulfate , sodium thiosulfate , soluble starch , sodium azide , potassium dichromate , silver sulfate , mercury sulfate , ferroin indicator solution , ferrous ammonium sulfate- , sodium fluoride , spadns , hydrazine sulfate , hexamethylenetetramine , 1, 10- phenanthroline , ammonium acetate , conc hcl , sodium sulfate , barium chloride , sodium acetate , potassium nitrate , acetic acid , chloroform , calcium carbonate 99.95 suprapur , lauryl tryptose broth , plate count agar , ph indicator paper , silica gel , magnesium sulfate , calcium chloride , conc nitric acid , 2 ethoxyethanol for synthesis , potassium peroxodisulfate , potassium sodium tartrate tetrahydrate- , sodium carbonate , buffer solution traceable , acetone , sodium sulfate , silicone grease , conc hydrofluoric acid , ethanol total quantity : 52743