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Molecular
formula:Na2S2O3.5H2O
Molecular weight:248.18
Descriptions:Sodium Thiosulfate, the popular name is big
soda, Hypo, belongs in transparent single crystal system.it is
adourless and salty. Its specific gravity is 1.729. When be heated
over 100°C ,it losts the 5 crystal water. It is easily soluble
in water and unsoluble in alcohol. It will be decomposed in acid
liquid and have strong reducibleness. It is easily dehydration
when dry air over 33°C and deliquescence in moist air.
Specifications:
| Index |
High grade |
1st grade |
| Purity %min. |
99 |
98 |
| Water insolubles %max. |
0.01 |
0.03 |
| Sulphur matter (by S) %max. |
0.001 |
0.003 |
| Fe %max. |
0.001 |
0.003 |
| PH (200g/L solution) |
6.5-9.5 |
6.5-9.5 |
Uses:Use for fixer, exectnoplate, purify water, reducing
agent in chemical industry,etc.
Packing:In plastic woven bag of 50Kgs nett each with plastic lining.
Notes:Stock in dry, cold storehouse, avoid sunlight and rain
at transportation
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