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.

Molecular Weight: 190.09

PH: 4.0-4.6

Prohibited Substance: strong acid, strong oxidant
 

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.
 

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