m-Phenylenediamine|1,8-Diaminonaphthalene|1,5-Diaminonaphthalene--Changzhou Chungang Chemical Co., L

Sodium thiosulfate

Synonyms

Sodium Thiosulfate (Big Soda)

Molecular weight

248.18

Molecular Formula

Na₂S₂O₃.5H₂O

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.

Specification

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

Extra Best Best specification 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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