sodium sulphite

Application:bleaching agent for paper pulps ;waste water treatmentreducing and sulphonating agent for chemical synthesis bleaching agent for textilescolors stripper and deoxidization ;floating agent for mining industry; auxiliary chemical in tanning process . Storage & handling:Store the product in a cool and dry placeavoid 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: ITEM FOOD GRADE TECH GRADE TECH GRADE Na2SO3 > 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% ..