Xinxiang City Yuguang Technology Co., Ltd

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  • Company Name: Xinxiang City Yuguang Technology Co., Ltd
  • Country/region: China
  • Contact Person: Ms.Betty Gao
  • Tel: 86-0373-5858028
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industrial grade sodium pyrosulfite

  • CAS No:7681-57-4 Sodium metabisulfite
    Molecular Structure

    Detailed Description

    Molecular formula: Na2S2O5
    Molecule weight: 190.10
    Appearance: White or light yellow crystalline powder
    Quality standard: HG/T2826-2008

    Company standard
    Item Index
    Total content(as Na2S2O5)% ≥ 96.5
    Main assay(as SO2)% ≥ 65.4
    Fe(as Fe)% ≤ 0.004
    Water-insoluble % ≤ 0.048
    Heavy metals(as Pa)% ≤ 0.0018

    National standard

    Item Index
    Top-grade First grade Qualified product
    Total content(as Na2S2O5)% ≥96.0 ≥94.0 ≥92.5
    Main assay(as SO2)% ≥65.0 — —
    Fe(as Fe)% ≤0.005 ≤0.010 ≤0.015
    Water-insoluble % ≤0.05 ≤0.05 ≤0.015
    Heavy metals(as Pa)% ≤0.002 — —

    Application:
    Mordant of printing and dyeing;
    Antichlor of textile after bleaching;
    Reducing agent of chemical industry and medicine;
    Decolorizer of bamboo, wood and paper fiber;
    Beneficiation reagent of nonferrous metals;
    Coagulator for rubber;
    Used as hydrocarbyl spices aldehydes in perfume industry;
    Used as hair removal agent, softener and wear resistant agent in leather industry;
    Used as eikonogen, reducing agent, protective agent for fixing bath in photographic industry;
    Sewage treatment.
    Packing: in white PP laminated bag with inner poly bag.
    Net weight: 25 kg/bag, 50kg/bag.