Commodity: sodium thiosulfate
Cas no.: 7772-98-7
Molecular formula: Na2S2O3
Package:25kg plastic woven bags or others
Property:Single crystal is white crytallized powder, 1.667 proportion, soluble in water, alcohol, in air heating is decomposed into sodium and sulfur dioxide oxidation. In the air (oxygen from the burning LiuHuaJian, produce and sulfur
Application: Mainly used for fixing agent photography industry. Secondly as tanning time chromate salt reductants and nitrogen exhaust of neutralizers, salt, wheat and hair bleach and pulp bleaching agent of chlorine when. Also used for tetraethyl lead, dye intermediates, etc and ore mention silver etc.
Specification:
|
Item
|
Photo grade |
Tech grade |
Anhydrous grade |
|
Appearance |
Colorlesstransparent crystal |
Colorlesstransparent crystal |
White power |
|
Assy |
≥99.00% |
≥98.5% |
≥98.0% |
|
Waterinsoluble |
≤0.01% |
≤0.03% |
≤0.03% |
|
Sulfide |
≤0.001% |
≤0.003% |
≤0.003% |
|
Fe |
≤0.001% |
≤0.003% |
≤0.003% |
|
PH value |
6.5-9.5 |
6.5-9.5 |
6.5-9.5 |
