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    Sodium Metabisulfite


    Property: white or light yellow crystal powder, a strong smell of sulfur dioxide,relative density is 1.4, easy to dissolve in water and glycerin, water solution. It has acidity,and its solubility will become large while raising the temperature and is less to dissolve in ethanol.
    Molecular Formula : Na2S2O5
    Molecule Weight : 190.12
    CAS NO .: 7681-57-4
    Appearance : White Free Flowing Fine Crystal or Powder
    Packing: Packed in 25kg plastic woven bag, 25kg Kraft paper bag, 25kg PE bag, 500kg/1000kg/1100kg/1200kg jumbo bag or as per the buyer's requirement.

     

    Specification For Food Grade and Industry Grade :

     

    Item Food Grade Industry Grade
    Purity(As Na2S2O5) ≥98.0% ≥97.0% ≥96.0%
    Sulfur Dioxide(SO2) ≥65.0% ≥65.0% ≥65.0%
    Arsenic(As) ≤0.0002% -- ≤0.0001%
    Heavy Metals(As Pb) ≤0.0005% -- --
    Selenium(Se) ≤0.0005% -- --
    Iron(Fe) ≤0.002% ≤0.005% ≤0.005%
    Water Insoluble ≤0.02% ≤0.05% ≤0.05%
    PH Value 4.0-4.8 4.0-4.8 4.0-4.8
    Remark Conformed with FCCV and E223 Standard
     
    Specification for Pharmaceutical Grade and Photo Grade  
    Item Pharmaceutical Grade Photo Grade
    PURITY(AS Na2S2O5 ) ≥96.0% ≥96.5%
    SULFUR DIOXIDE(SO2) ≥65.0% ≥65.0%
    CHLORIDE(As NaCL) ≤0.003% ≤0.005%
    ARSENIC(As) ≤0.0001% ≤0.0001%
    HEAVY METALS(As Pb) ≤0.0005% ≤0.0008%
    SELENIUM(Se) ≤0.0001% ≤0.0005%
    IRON(Fe) ≤0.001% ≤0.001%
    Copper(Cu) ≤0.0001% ≤0.0001%
    Nickel(Ni) ≤0.0001% --
    WATER INSOLUBLE ≤0.01% ≤0.01%
    PH VALUE: 4.0-4.8 4.0-4.8



    International Trade:
    Contact person : Ms.Dora , Ms Cherry
    Tel : 0086-536-8256719, 13356706380
    Fax : 0086-536-8256716
    Moible: 0086-13806499031,, 15065607933
    QQ: Dora: 3001383736, Cherry: 3001399245
    E-mail: dora@jiaozichem.com, cherry@jiaozichem.com
    Website : www.pkspin.org , www.jiaozichem.com?
    Add:Room 1101&1103,Building D,Zhongtu Mansion,No.6565 East Fushou Street,Weifang City,Shandong,China

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    Copyright(C)2017 , Shouguang Boyu Chemical Co., Ltd All Rights Reserved.  Supported by  ChemNet  ChinaChemNet Toocle


     
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