purchase of different types of lab . chemicals- reagents from manufacturers or distributors or their accredited agents for supply as per the specifications in the enclosed list online tender for purchase of different types of lab . chemicals and reagents from manufacturers-distributors or their accredited agents for supply as per the specifications in the enclosed list , chemicals/ reagents : , 4-aminoantipyrine ( 4-aminophenozone ) ar/lr , acetone ar , acetonitrile hplc , ammonia solution , strong ar , ammonium ferric sulphate ar , ammonium ferrous sulphate ar , ammonium sulphamate ar , acetic anhydride ar/lr , buffer tablets - ph 4 . 0 , buffer tablets - ph 7 . 0 , buffer tablets - ph 9 . 2 , 1-chloro-2 , 4-dinitro benezene 99% ar , carban tetrachloride ar , chloroform ar , cinnamaldehyde , dimethylglyoxime ar , dithizone ar , ethylene-diamine-tetra-acetic acid ( e . d . t . a . ) ar , ferroin indicator ( 0 . 025m soln . of 1 , 10 phenonthroline ) ar/gr , 1-heptane sulphonic acid sodium salt hplc , iso-octane ( i . e . 2 , 2 , 4-trimethylpentane ) hplc , karl fischers reagents , methane sulphonic acid hplc , methanol dried for karl fischer kf grade , dimethylformamide ar , orthophosphoric acid hplc , di-potassium hydrogen phosphate ( diabasic ) ar , perchloric acid , 0 . 02 n ( n/50 in anhydrous acetic acid ) , petroleum ether 40- 60 ( petroleum benezene 40 - 60 ) gr , petroleum ether 60 - 80 ( petroleum benezene ) gr , phenol crystal , 99% ar , potassium dihydrogen phosphate ( monobasic ) hplc , potassium dihydrogen phosphate ( monobasic ) ar , potassium nitrate ar/gr , silic gel 60 f 254 plates ( for tlc ) ( pkt . of 25 sheet ) , tetrabutylammonium hydroxide 40% in water ar , tetramethyl ammonium hydroxide soln . 25% in methanol , tetrabutylammonium hydroxide , 0 . 1n in methanol / toluene ar , tetrazolium blue ar , thiosemicarbazide ar , 2 , 3 , 5-triphenyl tetrazolium chloride ( tetrazolium salt ttc ) ar , tris- ( hydroxymethyl ) aminomethane , 99% extrapure excelar , vaniline , 99 . 9% ar , whatman filter paper - no . 1 ( 125 mm . ) , whatman filter paper - no . 1 ( 90 mm . ) , whatman filter paper - no . 42 ( 125 mm . ) , whatman filter paper - no . 42 ( 90 mm . ) , mambrane disc filter , 0 . 45u ( 47mm ) , tissue roll - 2 ply roll . , absorbent cotton , butter paper , liquid soap ( for washing of glass apparatus )