corrigendum - procurement of laboratory chemicals / reagents under cwa ( wns ) -ii ., nit no. 11 / cwa ( wns ) ii / ( 2018-19 ) :-1 1 : 10 phenanthroline ( 25 gm each pk. ) ar 2 acetic acid ( 2.5 l. each pack. ) ar 3 aluminon ( 25 gm each pack. ) ar 4 ammonia solution ( 500 ml each pk ) ar 5 ammonium chloride ( 500 gm pk ) ar 6 amm. molybdate ( 250 gm each pk ) 7 ascorbic acid 500 gm each pack ) ar 8 e.d.t.a ( 100 gm each pack. ) ar 9 eriochrome black t ( 25 gm each pk. ) ar 10 eriochrome cyanine r ( 25 gm each pk. ) ar 11 ethanol ( 500 ml. each pack ) 12 g.f.c. ( whatman 47 mm dia ) 100pcs / pkt 13 glycerol ( 500 ml each pack. ) ar 14 hydrochloric acid ( 2.5 l. each pk. ) ar 15 iso propyl alcohol ( 500 ml pack. ) ar 16 manganous sulphate ( 500 gm pk ) ar 17 mercuric chloride ( 100gm ) ar 18 mercuric sulphate ( 250gm ) ar 19 mercuric iodide ( 100 gm each pack. ) ar 20 o-toludiene powder ( 25 gm each pk. ) ar 21 phenol red indicator ( 25 gm each pack. ) 22 potassium chromate ( 500 gm pk. ) ar 23 potassium dichromate ( 500 gm pk. ) ar 24 potassium iodide ( 250 gm pack. ) ar 25 potassium permanganate ( 500 gm pk. ) ar 26 petroleum spirit ( 500 ml each pack. ) ar 27 rhodanine indicator ( 5 gm each pack. ) 28 silver nitrate ( 25 gm each pack. ) ar 29 silver sulphate ( 25 gm each pack. ) ar 30 sodium acetate ( 500 gm each pack. ) ar 31 sodium arsenate ( 100 gm each pk. ) ar 32 sodium hydroxide pell ( 500 gm pk. ) ar 33 sodium sulphate ( 500 gm each pack. ) ar 34 spadns ( 10 gm each pak. ) 35 stannous chloride ( 100 gm each pack. ) ar 36 starch soluble ( 500 gm each pack. ) ar 37 sulfuric acid ( 2.5 l each pack. ) ar 38 sulphanilic acid ( 100 gm each pack. ) ar 39 whatman filter paper ( gr 42, 12.5 cm 100 / pk )