supply of ethanol, ferroin, sulphuric acid, ammonium ferrous sulphate hexahydrate, potassium dichromate , ethanol ar grade(packing 500 ml) [ warranty period: 30 months after the date of deli very ] ] , ferroin, indicator solution (packing 100 ml) make of fisheror rankemor merck or himedia or similar as per is. [ warranty period: 30 months after the date of delivery ] ] , sulphuric acid (h,so)extra pure, (packing5000 ml) make of fisher or rankem or merck or him edia or similar as per is. [ warranty period: 30 months after the date of delivery ] ] , ammonium ferrous sulphate hexahydrate (nh),fe(so:)2.6h,0), extra pure, ar grade (packi ng500 gm) [ warranty period: 30 months after the date of delivery ] ] , potassium dichromate (packing 1000gm) make of fisher or rankem or merck or himedia or si milar as per is. [ warranty period: 30 months after the date of delivery ] ]