Sodium hydrosulfite :85%,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.
Main Application:used as reductant in printing and dyeing industry; also used in medicine,mineral processing,,thiourea and sulfide synthesis
Specification:
Industrial:HG/T 2074-1991 JIS K 1476-1995
Food grade :GB 2682-1995
| Index name |
90% |
88% |
85% |
Food grade |
Na2S2O4 |
≥90% |
≥88% |
≥85% |
≥85% |
Iron(Fe) |
≤20ppm |
≤20ppm |
≤20ppm |
≤20ppm |
Zinc (zn) |
≤1ppm |
≤1ppm |
≤1ppm |
≤1ppm |
Clarity |
Clarity |
Clarity |
Clarity |
Clarity |
EDTA |
- |
- |
- |
Qualified |
Arsenic (As) |
- |
- |
- |
≤1ppm |
Heavy metals |
- |
- |
- |
≤1ppm |
Formate |
- |
- |
- |
≤0.05% |
Water insoluble |
≤0.05% |
≤0.05% |
≤0.05% |
- |
Storage period |
12 |
12 |
12 |
12 |
|
