sodium metabisulphite

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·molecular formula : Na2.SO3 ·M.W :126.04 ·Basic Characteristics : Colorless, single-crystal or powder ramps, soluble in water, do not dissolve in alcohol, etc. ·Quality Standards : A :Sodium sulfite (single-crystal ) High-class products First-class products Conforming products Purity（Na2.SO3 )，%，≥ 99.0 98.5 98.0 Water，%，≤ 1.4 2.0 2.5 Purity (Nacl ) ,%, ≤ 0.10 0.17 -- Water insoluble,%, ≤ 0.05 0.06 0.10 Purity (sodium nitrate ),%, ≤ 0.80 1.00 1.90 ?B:sodium sulfite (powder ) Name of indicators indicators High-class products First-class products Conforming products Na2.SO3, %,≥ 97.0 96.0 93.0 Fe ,%, ≤ 0.003 0.005 0.01 Water insoluble,%, ≤ 0.02 0.03 0.05 Na2CO3, %, ≤ 0.10 0.40 0.60 Na2SO4, %,≤ 2.5 -- -- NaCl, %,≤ 0.10 -- -- ·uses: For sulfite-cellulose acetate, sodium thiosulfate, organic medicines, such as bleach fabric, but also used as a reducing agent, preservatives, etc. to chlorine. ·Storage: Dry and hermetic ·Packing: Net weight 25Kgs or 50kgs with plastic woven bag ; Or 1000kgs big bags.lhk3817@yahoo.cn

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