CAS No.: 7681-57-4

Other Names: sodium pyrosulfite/ sodium disulfite

MF: Na2S2O5

EINECS No.: 231-673-0

Place of Origin:Shandong,China(mainland)

Grade Standard: Food Grade,Industrial Grade

Purity: 96.5%

Appearance: white or slight yellow crystalline form powder or small crystal

Application: used as bleaching agent, reducing agent, organic synthesis, ect.

Brand Name: RuiDeSheng

Molecular Weight: 190.09

PH: 4.0-4.6

Prohibited Substance: strong acid, strong oxidant

 Specifications 97.2% sodium metabisulfite
We are a well-known manufactory in China
Monthly production capacity of 90% for export

It has acidity, and its solubility will become large while raising the temperature and is less to dissolve in ethanol.

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.

 

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)	0.001%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:	Cinformed with FCC V and E223 Standard