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sodium metabisulfite

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  Post Date: Jan 21,2014
  Expiry Date: Jul 20,2014
  Detailed Description: Cas No. :7681-57-4 Specs:white or light yellow crystal powder

SpecificationForFoodGradeandIndustryGrade:

ItemQualityIndex

FoodGradeIndustryGrade

Purity(AsNa2S2O5)98.0%min96.0%min

SulfurDioxide(SO2)65.0%min65.0%min

Arsenic(As)0.0002%max-

Heavymetals(AsPb)0.0005%max-

Selenium(Se)0.0005%max-

Iron(Fe)0.001%max0.002%max

Waterinsoluble0.02%max0.05%max

PHvalue:4.0-4.84.0-4.8

Remark:ConformedwithFCCVandE223Standard

SpecificationforPharmaceuticalGradeandPhotoGrade ItemQualityIndex

PharmaceuticalGradePhotoGrade

Purity(AsNa2S2O5)98.0%min98.0%min

SulfurDioxide(SO2)65.0%min65.0%min

Thiosulphate(AsS2O3):0.05%max0.05%max

Chloride(AsCL-):30ppmmax50ppmmax

Arsenic(As):1ppmmax1ppmmax

Lead(Pb):1ppmmax2ppmmax

Copper(Cu):1ppmmax1ppmmax

Iron(Fe):5ppmmax5ppmmax

Mercury(Hg):0.1ppmmax1ppmmax

Chromium(Cr):1ppmmax-

Selenium(Se):1ppmmax5ppmmax

Zinc(Zn)1ppmmax1ppmmax

Cadmium(Cd)1ppmmax-

Nickel(Ni)1ppmmax-

Na2SO3+Na2SO41.5%max-

PHvalue:4.0-4.84.0-4.8

Remark:ConformedwithUSPstandard

Application:(1)FoodGrade:Bleachagent(e.g.candies,cake,bambooshoots,etc);Looseagent(e.g.bread,crackeretc);Antisepticandgermicide(e.g.fruitjuice,tinnedfood,brews,thecerealsfoodisdefendedstorageetc);Inhibitorandfreshenagent(e.g.daylily,seafood,fruitandvegetableetc).(2)IndustryGrade:Mordantofprintinganddyeing;Dechlorinateoftextileafterbleaching;Sulphonatedagentandreducerofchemicalindustryandpharmacy;Bleachofpaperpulp,bambooandtimberbleachofStap;Treatmentagentofwastewater;RubbersolidifyingagentPerfumeindustryisservedashydrocarbonperfumealdehydeThehideprofessionemploytodotomoltdoseandpliabledoseandwearproofdose;sewagetreatment,andsoon.(3)PharmaceuticalGrade:Inchemicalsynthesisintheproductionofacrylicfibre,vitaminK,vitaminA,pharmaceuticalintermediates,etc.(4)PhotoGrade:Thesensitizeindustryisservedasthedevelopingagentreductantandtheprotectionoffixingbathdose.Storage:Storetheproductinadryandcoolplace.

  CAS Registry Number:

7681-57-4
  Synonyms: ;Sodium pyrosulfite;disodium disulphite;Sodium metabisulphite;Sodium disulphite;Sodium pyrosulphite;SODIUM DISULFITE;disodium oxidosulfanesulfonate oxide;Sodium Metabi;Metabisulfite Sodium;Sodium Metabisulfite (Food Grade);
  Molecular Formula: Na2S2O5
  Molecular Weight: 190.1065
  Molecular Structure: 7681-57-4 Sodium metabisulfite
  Hazard Symbols:  Xn:Harmful;
  Risk Codes: R22:;
R31:;
R41:;
  Safety Description: S26:;
S39:;
S46:;

  Company: Weifang Qihui Chemical Co.,Ltd.     [ China ]        
  Contact: Qi Chunmei
  Tel: +86-536-5336333 13864665568
  Fax: +86-536-5336333
  Email: wfqh888@126.com
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