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Sodium Sulfite
【English name】: Sodium Sulfite
【Molecular formula】: Na2SO3
【Physical and chemical properties】: White crystal or powder, PH: 9-9.5; density: 2.633(15.4℃); refractive index: 1.565; molecular weight: 126.04
【Executive standard】: HG/T2967-2010
| item |
index |
| superior grade |
top grade |
qualified |
| sodium sulfite (Na2SO3) %≥ |
98 |
97 |
96 |
| ferrum(Fe) %≤ |
0.003 |
0.003 |
0.005 |
| water insolubles%≤ |
0.01 |
0.02 |
0.03 |
| free alkali(Na2SO3) %≤ |
0.001 |
0.1 |
0.4 |
| sodium sulfate(Na2SO4) %≤ |
1.2 |
2.5 |
2.5 |
| chloride(Nacl) %≤ |
0.003 |
0.1 |
0.1 |
【Uses】:
As deoxidizing agent and bleaching agent in dyeing industry; as developing agent in photographic industry; as reducing agent in organic industry; also applied in paper-making, electronic and water treatment industry
【Packaging】: 25kg plastic woven bag
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