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1. name of product: potassium sulfite
2. specification:
Test item | Test Standard | ||
Assay | 99.0%~101.0% | ||
Appearance of solution | To pass test | ||
Water-insoluble | 0.002% | ||
Chloride | 0.0005% | ||
Nitrogen compounds | 0.002% | ||
Phosphate | 0.001% | ||
Silicate | 0.001% | ||
Sodium | 0.02% | ||
Magnesium | 0.0005 | ||
Aluminum | 0.001% | ||
Calcium | 0.002% | ||
Iron | 0.0005% | ||
Arsenic | 0.0003% | ||
Heavy metal (Pb) | 0.0005% |
Test item | Unit | Specification | Test method |
K2SO3 | g/100g | 98 | ISO 5990-1996(E) |
K2S2O3 | g/100g | max.0.01 | spectrophotometry |
pH value(diluted with water to 10%) |
| 9.0-10.0 | ISO 5990-1996(E) |
heavy metal(measured by Pb) | mg/kg | max.10 | AES |
Fe | mg/kg | max.10 | AAS |
KCl | g/100g | max.0.6 | IC |
sulphate(measured by K2SO4) | g/100g | max. 0.5 | IC |
3. packing:
25kgs/bag, P.P woven bag outside, P.E bag inside, without pallets
25kgs/bag, P.P woven bag outside, P.E bag inside, with pallets
1000kgs/ big bag
1200kgs/ big bag
25kgs/bag, strong P.E bag
4. payment terms: T/T, D/P, L/C
5. shipment: within 7 days after receiving the prepayment
6. price: pls tell us your destination, then we will quotate for you
potassium sulfite