We are a well-known manufactory in China,
1,
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 | |
2,
Photo Grade and Pharmaceutical Grade | ||
Item | Quality Index | |
Pharmaceutical Grade | Photo Grade | |
Purity(As Na2S2O5) | 98%min | 98%min |
Sulfur Dioxide(SO2) | 65.0%min | 65.0%min |
Thiosulphate(As so2) | 0.05%max | 0.05%max |
Chloride(As CL-) | 30 ppm max | 50 ppm max |
Arsenic(As) | 1 ppm max | 1 ppm max |
Lead(Pb) | 1 ppm max | 2 ppm max |
Copper(Cu) | 1 ppm max | 1 ppm max |
Iron(Fe) | 5 ppm max | 5 ppm max |
Mercury(Hg) | 0.1 ppm max | 1 ppm max |
Chromium(Cr) | 1 ppm max | - |
Selenium(Se) | 1 ppm max | 5 ppm max |
Zinc(Zn) | 1 ppm max | 1 ppm max |
Cadium(Cd) | 1 ppm max | - |
Nickel(Ni) | 1 ppm max | - |
Na2SO3+Na2SO4 | 1.5% max | - |
PH value | 4.0-4.8 | 4.0-4.8 |
Remark | Conformed with USP standard | |
Sodium metabisulphite industrial grade
