USD $1.00-10.00 / Kilogram
USD $12.00-15.00 / Kilogram
hemical name: sodium sulfite anhydrous
cas no.: 7757-83-7
appearance: white crystal or powder
molecular formula: na2so3 (.7h2o)
molecular weight: 126.04 (252.04)
melting temperature: 150℃
water solubility: dissolve in water
item |
quality index |
|
industry grade |
food grade |
|
purity ( as na2so3) |
96.0% min |
98.0% min |
sodium sulphate ( so4) |
2.0% max |
1.2% max |
chlorides ( as nacl) |
0.5% max |
0.08% max |
arsenic ( as ) |
- |
0.0002% max |
heavy metals ( as pb ) |
- |
0.0005% max |
iron (fe) |
0.005% max |
0.003% max |
water insoluble |
0.05% max |
0.01% max |