Product Information
CAS RN.: | 7681-57-4 |
EINECS: | 231-673-0 |
H.S.CODE: | 2832.1000.00 |
Chemical Analysis
Component | Industrial Grade | Food Grade | Medicine Grade |
Appearance | White or yellowish crystaler | ||
Assay(Na2S2O5 ) | 96.5%min | 97%min | 98%min |
water insoluble matter | 0.05%max | 0.03%max | 0.02%max |
Iron content(Fe) | 0.005%max | 0.003%max | 0.002%max |
Arsenic content(As) | 0.0001%max | 0.0001%max | 0.0001%max |
Pb | 0.0005%max | 0.0005%max | 0.0003%max |