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By certification 
Molecular Formula: Na2SO3
Molecule Weight: 126.04
Appearance: white or light yellow crystalline powder
Specifications
Food Grade:
Quality standard: GB1894--2005
Item |
Value |
sodium sulfite (Na2SO3), mass fraction/% |
≥ 97.0 |
Fe, mass fraction/% |
≤ 0.01 |
Free alkali(as Na2SO3), mass fraction/% |
≤0.60 |
Heavy metals(as Pb), mass fraction/% |
≤0.001 |
As (As), mass fraction/% |
≤0.0002 |
Clarity |
Passed |
Tech Grade:
Quality standard: HG/T 2967-2000
Item |
Value |
||
Top-grade |
First grade |
Qualified product |
|
sodium sulfite (Na2SO3),% |
≥ 97.0 |
≥ 96.0 |
≥ 93.0 |
Fe,% |
≤ 0.003 |
≤ 0.005 |
≤ 0.02 |
water-Insoluble ,% water-Insoluble ,% |
≤ 0.02 |
≤ 0.03 |
≤ 0.05 |
Free alkali(as Na2SO3),% |
≤ 0.10 |
≤ 0.40 |
≤ 0.80 |
Sulfate(as Na2SO4),% |
≤ 2.5 |
- |
- |
Chloride(as NaCl),% |
≤ 0.10 |
- |
- |
Uses:dechlorinating agent, bleaching agent, developer, reductant, stabilizer, or used in papermaking, electronic and water treatment industry.
Packing:in polythene plastic bag with a polypropylene overbag, paper-plastic composite bag, kraft bag, etc.
Net weight:25,50,1000kilograms per bag or following your demand
