Sodium hydrosulfite 88%/ 90%
Chemical name ： hyposulphurous acid natrium
Molecular formula ： Na2S2O4
Appearance ： white free-flow crystal powders
Smell ： flavourless or smell of sulfur dioxide
Packing ： in 50kgs net iron drums with double-layer inner plastic bags.
Specifications ：
| items |
90% |
88% |
Na2S2O4 |
≥90% |
≥88% |
Fe |
≤20ppm |
≤20ppm |
Zinc ( Zn) |
≤1ppm |
≤1ppm |
heavy metals (as Pb) |
≤1ppm |
≤1ppm |
Water insolubles |
≤0.05% |
≤0.05% |
Shelf life ( month ) |
12 |
12 |
|
