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Sodium Metabisulfite

Date：2021-12-14      Categories：related product

  Post Date: Dec 14,2021
  Expiry Date: Jun 12,2022
  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;
  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:;

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