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Sodium Metabisulfite

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  Post Date: Nov 21,2024
  Expiry Date: May 20,2025
  Detailed Description: Cas No. :7681-57-4
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
Quality Index
Food Grade
Industry Grade
Purity ( As Na2S2O5)
98.0% min
96.0% min
Sulfur Dioxide( SO2)
65.0% min
65.0% min
Arsenic ( As )
0.0002% max
-
Heavy metals ( As Pb )
0.0005% max
-
Selenium (Se )
0.0005% max
-
Iron (Fe)
0.001% max
0.002% max
Water insoluble
0.02% max
0.05% max
PH value :
4.0-4.8
4.0-4.8
Remark :
Conformed with FCC V and E 223 Standard
 
Specification for Pharmaceutical Grade and Photo Grade  
Item
Quality Index
Pharmaceutical Grade
Photo Grade
Purity ( As Na2S2O5)
98.0% min
98.0% min
Sulfur Dioxide( SO2)
65.0% min
65.0% min
Thiosulphate ( As S2O3) :
0.05 % max
0.05% max
Chloride ( As CL-) :
30 ppm max
50ppm max
Arsenic ( As ) :
1ppm max
1ppm max
Lead ( Pb ) :
1 ppm max
2ppm max
Copper (Cu) :
1 ppm max
1ppm max
Iron (Fe ) :
5 ppm max
5ppm max
Mercury (Hg) :
0.1ppm max
1ppm max
Chromium (Cr) :
1 ppm max
-
Selenium (Se ) :
1 ppm max
5ppm max
Zinc (Zn)
1 ppm max
1ppm max
Cadmium (Cd )
1ppm max
-
Nickel (Ni)
1ppm max
-
Na2SO3 + Na2SO4
1.5% max
-
PH value :
4.0-4.8
4.0-4.8
Remark :
Conformed with USP standard
 
Application:
(1) Food Grade: 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).
(2) Industry Grade: 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 Stap; Treatment agent of waste water; Rubber solidifying agent Perfume industry is served as hydro carbon perfume aldehyde
The hide profession employ to do to molt dose and pliable dose and wearproof dose; sewage treatment, and so on .
(3) Pharmaceutical Grade: In chemical synthesis in the production of acrylic fibre, vitamin K, vitamin A, pharmaceutical intermediates, etc.
(4) Photo Grade: The sensitize industry is served as the developing agent reductant and the protection of fixing bath dose.
Storage: Store the product in a dry and cool place.

  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 Zhisheng Chemical Co., Ltd.     [ China ]          
  Contact: Manager Du
  Tel: +86-536-8224688
  Fax: +86-536-8224688
  Email: sales@zhishengchem.com
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