supplying of chemicals to wbpcb supply of chemicals to the laboratories of the west bengal pollution control board under nmcg project , supply of chemicals to the laboratories of wbpcb , conc. sulphuric acid (98%) , silver sulphate , manganese sulphate monohydrate , potassium iodide , mercury (ii) sulphate , ferroin indicator solution , sodium azide , lead carbonate , sulfamic acid , di potassium hydrogen phosphate (anhydrous) , cdta , n-hexane , dichloro-methane , cadmium coarse powder, 0.3-1.6 mm , iodine sublimed , neda , sodium hydroxide pellets , magnesium sulphate , ferric chloride , ferrous ammonium sulphate , potassium dichromate , ammonium chloride , magnesium chloride (hexahydrate) , hydrochloric acid , sodium chloride , phenolphthalein 1% indicator solution , dpc , 4- ammino anti pyrene , potassium ferry-cyanide , potassium per oxo di sulphate , barium chloride , sodium acetate trihydrate , potassium nitrate , acetic acid , ammonia solution , bromocresol green indicator ph 3.6 , zinc acetate , methyl red , calcium chloride fused , copper sulphate , phosphoric acid , sulphanilamide , ammonium molybdate , edta , stannous chloride , silver nitrate , eriochrome black t c.i.no. 14645 , oxalic acid , hexane fraction from petroleum , carminic acid c.i.no.75470