supply of chemicals to the laboratories of the west bengal pollution control board under namami gange programme ( package-1 ) - 1 general chemicals 2 4-amino antipyrine 3 acetone 4 acetonitrile 5 ammonia solution 6 ammonium chloride 7 ammonium di hydrogen phosphate 8 ammonium hepta-molybdate tetrahydrate 9 ammonium iron ( ii ) sulfate hexahydrate 10 barium chloride dihydrate 11 boric acid 12 bromocresol green indicator 13 cadmium coarse powder, for analysis ( 0.3-1.6 mm ) 14 calcon ( c.i.15705 ) metal indicator 15 calcium carbonate precipitat 16 calcium chloride fused 17 cod solution ( a ) containing hg ( ii ) sulphate for closed reflux method as per usepa for spectrophotometric measurement 18 cod solution ( b ) for closed reflux method as per usepa contains potassium dichromate, sulphuric acid for cod range 100 to 1500 mg / l for spectrophotometric measurement 19 cod solution ( b ) for closed reflux method as per usepa contains potassium dichromate, sulphuric acid for cod range 10 to 150 mg / l for spectrophotometric measurement 20 copper ( ii ) sulfatepentahydrate for analysis 21 diethyl ether for analysis 22 dichloromethane for chromatography 23 di-potassium hydrogen phosphate anhydrous 24 di-sodium hydrogen phosphate 25 e d t a 26 eriochrome black t 27 ethanol min 99.9 % 28 ferroin indicator 29 glutamic acid 30 hexane fraction from petroleum 31 hydrochloric acid about 37% 32 hydrogen peroxide 30% 33 hydroxylamine hydrochloride 34 lead carbonate 35 magnesium chloride ( hexahydrate ) 36 magnesium matrix modifier for graphite furnace aas c ( mg ) = 10.0 ± 0.2 g / l ( mg ( no3 ) 2 * 6 h2o in hno3 ca. 17% 37 magnesium sulphate 38 manganese ( ii ) sulfate 39 mercury ( ii ) sulphate 40 methyl orange 0.04% indicator solution 41 methyl red 0.01%indicator solution 42 neda 43 n-hexane for chromatography 44 nitric acid 69 % 45 nitric acid about 69% 46 ortho- phosphoric acid 47 palladium matrix modifier for graphite furnace aas c ( pd ) = 10.0 ± 0.2 g / l ( pd ( no3 ) 2 / hno3 ca. 15% ) 48 ph indicator paper 1.0-14.0 49 phenol for synthesis 50 phenolphthalein 1% indicator solution 51 potassium chloride 52 potassium chromate 53 potassium dihydrogen phosphate 54 potassium hexacyanoferrate ( iii ) 55 potassium hydrogen phthalate 56 potassium iodide for analysis 57 potassium permanganate 58 potassium peroxodisulfate for analysis ( <= 0.001% n ) 59 propan-2-ol ( iso-propyl alcohol ) 60 silver nitrate 61 silver sulphate 62 sodium borohydride 63 sodium chloride 64 sodium hydroxide pellets ( low chloride ) 65 sodium hypochlorite ( 4% ) 66 sodium metabisulfite 67 sodium nitroprusside dihydrate 68 sodium sulphate anhydrous 69 sodium azide 70 stannous chloride 71 sulfamic acid 72 sulfuric acid about 98% 73 trans-1, 2-diaminocyclo hexane n, n, n, n, tetra acetic acid ( cdta ) 74 tri- sodium phosphate dodecahydrate 75 tri-sodium citrate ( dihydrate )