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premium sodium pyrosulfite

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  Post Date: Nov 23,2024
  Expiry Date: May 22,2025
  Detailed Description: Cas No. :7681-57-4 Molecular Formula:Na2S2O5
Molecule Weight:190.10
Appearance:White or light yellow crystalline powder
Quality standard:GB1983——1998

Company standard

Item Index
Content (as Na2S2O5) ≥ 97.5
Iron(as Fe) % ≤ 0.001
Clarify degree clearly
Heavy metals(as Pb) % ≤0.0005
Arsenic(as As) % ≤ 0.0001

Chinese Standard

Item Country index
Content (as Na2S2O5) ≥ 95.0
Iron(as Fe) % ≤ 0.003
Clarify degree A little turbid
Heavy metals(as Pb) % ≤0.0005
Arsenic(as As) % ≤ 0.0001

Main uses:
Bleach agent (e.g.candies, cake, bamboo shoots, etc);
Loose agent (e.g.bread, cracker etc);
Antiseptic and germicide (e.g.fruit juice, tinned food ，brews, the cereals food is defended storage etc);
Inhibitor and freshen agent (e.g.day lily, seafood, fruit and vegetable etc)

quality standard:HG/T2826——1997

Company Standard

Item
Value

Content(as Na2S2O5 ) %
≥ 97.0

Fe % (as Fe) %
≤ 0.0015

water-Insoluble %
≤ 0.01

Arsenic(as As) %
≤ 0.0001


Chinese standard

Item
Value

Top-grade
First grade
Qualified product

Content(asNa2S2O5 ) %
≥ 96.0
≥ 94.0
≥ 92.5

Fe %(as Fe)
≤ 0.005
≤ 0.010
≤ 0.015

water-Insoluble %
≤ 0.05
≤ 0.05
≤ 0.10

Arsenic(as As) %
≤ 0.0001
—
—


Main uses:
Mordant of printing and dyeing;
Dechlorinate of textile after bleaching;
Sulphonated agent and reducer of chemical industry and pharmacy;
Bleach of paper pulp, bamboo and timber bleach of stapk; Treatment agent of waste water;
Rubber solidifying agent
Perfume industry is served as hydrocarbon perfume aldehyde
The hide profession employ to do to molt dose and pliable dose and wearproof dose ，
The sensitize industry is served as the developing agent reductant and the protection of fixing bath dose and so on; sewage treatment.


  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 Kailong Chemical Industry Co.,Ltd.     [ China ]          
  Contact: Mr.Tian
  Tel: 0086-536-5317817/9
  Fax: 0086-536-5339779
  Email: info@klong.cn
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