sodium sulphite

Application:bleaching agent for paper pulps ,waste water treatment, reducing and sulphonating agent for chemical synthesis ,bleaching agent for textiles,colors stripper and deoxidization ,floating agent for mining industry,auxiliary chemical in tanning process .shelf Life: One year Storage & handling:Store the product in a cool and dry place,avoid contact sunshine ,water and moisture, avoid contact with strong acid,oxidants or poisonous substances. Exposure to moisture will make it oxidze easily to sodium sulphate . Not store it for a long time . Product Specification:ITEMFOOD GRADETECH GRADETECH GRADENa2SO3> 97%> 96%> 93%FREE ALKALI< 0.1%< 0.4%< 0.4%IRON< 0.003%< 0.002%< 0.002%WATER INSOLUBLW MATTER< 0.02%< 0.05%< 0.05%SODIUM SULFATE(Na2SO4)< 2.5%…………..………….NaCl< 0.1%………………………..