Sodium metabisulfite

Description: Sodium metabisulphite Abbr.: SMBS Another name: Sodium pyrosulfite Sodium metabisulphate Formula: Na2S2O5 CAS No.: 7681-57-4 HS Code: 28321000 Usage: Sodium metabisulphiteis used as a food additive, leaching agent for textile fibres; Colors stripper and dechlorination; Preparation of Indigo Vat Dye; Solubilizing And acidyfing agent for leather industries; Bleaching agent for paper pulps; Preservative and sterilisation agent for food industries No. Specifications Industrial Grade Food Grade 1 Na2S2O5%≥ 96.0 2 SO2%≥ 64.0 3 Iron(Fe)%≤ 0.005 4 Water insolubles%≤ 0.05 5 PH 4.0-4.6 6 Arsenic(As)%≤ 0.01 7 Heavy metals, as Pb %≤ 0.002%