sodium sulfite

Product name: sodium sulfite Appearance: white crystalline powder Purity: 96% min Specification: Index name Super grade First grade Salable product Industrial grade Sodium sulfite ( Na2SO3 ) , % ≥ 97.0 96.0 93.0 90.0 Fe , ‰ ≤ 0.003 0.005 0.01 / Water insoluble matter , % ≤ 0.02 0.03 0.05 / Free alkali ( as Na2SO3 ) , % ≤ 0.10 0.40 0.60 / Na2SO4 , % ≤ 2.50 / / / NaCl , % ≤ 0.10 / / / Packing: In 25kg PP woven bags with PE inners Usage: Used in medicine, papermaking, tannage, leather, printing, dyeing, bleaching and food .