Sodium Thiosulfate

1. Chemical name: Sodium thiosulfate
2. CAS NO.: 7772-98-7
3. Structural formula:

4. Molecular formula: Na2S2O2·5H2O
5. Molecular weight: 248.17
6. Properties: monoclinic crystal, Melting point : 40-45℃, Relative density :1.729(17℃).

7. Specifications (HG/T 2328-2006):

Item	Photographic grade	First grade
Appearance	Colorless transparent crystal	Colorless transparent crystal
Main Content(Na2S2O2·5H2O)	≥99.00%	≥98.00%
Water Insoluble matter	≤0.01%	≤0.03%
Sulfide	≤0.001%	≤0.003%
Fe	≤0.001%	≤0.003%
Sodium chloride	≤0.05%	≤0.20%
PH	6.5~9.5	6.5~9.5

8. Package: 25Kg/50Kg compound plastic woven bag with inner polythene liner.

Or 1000Kg jumbo bag.

9. Applications:

Used in fixers,plating,leather,reductant,dechlorinating agent.
Sulfur dyeing agent.
As a blush preventive agent.
As a disinfectant and decolor agent.

Shelf Life: One year

10. Storage & Handing:

Store the product in a cool and dry place.
Prevent from direct sunlight, water and moisture.
Avoid contact with strong add oxidants.
Do not store it for long time.

← Sodium Metabisulfite

Sodium Silicate →

Products

Sodium Thiosulfate

Sodium Thiosulfate