Sodium thiosulfate
- CAS number
- 10102-17-7
- Molecular weight
- 248.19
- Molecular formula / chemical symbol
- Na2S2O3.5H2O
Description
The monoclinic system white crystalline powder, insoluble in ethanol, dissolved with water and turpentine. Weathering in dry air above 33 ℃, 48 ℃ decomposition, burning decomposition of sodium sulfide and sodium. The solution is slightly alkaline reaction. Case of acid decomposition and precipitation of sulfur and sulfur dioxide.USES
The color layer analysis the reagent spot analysis determination of cobalt, photographic fixer, dechlorination agents Capacity analysis commonly used reagents, determination of serum sodium system Injectable double sugar iron urea medium mordant.
Keywords:Surface treatment chemicals
Report
|
TEST ITEMS |
TEST RESULT |
|
|
|
(GR) |
(AR) |
|
Na2S2O3.5H2O |
≥99.5 |
99.0 |
|
pH(50g/L Solution，25℃) |
6.0-7.5 |
6.0-7.5 |
|
Clarity Test |
Qualified |
Qualified |
|
Water insoluble matter |
≤0.002 |
0.005 |
|
Chloride (Cl) |
≤0.02 |
0.02 |
|
Sulphate and sulphite (SO4) |
≤0.04 |
0.05 |
|
Total nitrogen amount (N) |
≤0.002 |
0.005 |
|
(K) |
≤0.001 |
-- |
|
(Mg) |
≤0.001 |
0.001 |
|
(Fe) |
≤0.0005 |
0.0005 |
|
(Ca) |
≤0.003 |
0.003 |
|
Heavy metals (as Pb) |
≤0.0005 |
0.0005 |