Ammonium thiosulfate

ATS

White odorless solid

Fixed

1.679 g · cm -3

150 ° C ( decomposition)

  • Slightly soluble in water (1800 g · l-1 at 20 ° C)
  • Almost insoluble in ethanol

2890 mg · kg -1 ( LD50, rat, oral)

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Ammonium thiosulfate is a chemical compound selected from the group of ammonium salts and inorganic thiosulfate.

Production and representation

Ammonium can be obtained (some with ammonia), oxidation of hydrogen sulfide by reaction of ammonium with sulfur dioxide by reaction of ammonium sulfite with sulfur or sulfides in aqueous solutions.

Properties

Ammonium thiosulfate decomposes above a temperature above 150 ° C, sulfur oxides, ammonia, and nitrogen oxides.

Use

Ammonium thiosulfate is used as a fast fixing (like sodium ) for the manufacture of the fixer in the film art photographic technique and the X-ray technology, and as a fertilizer.

CAS registry number PubChem
57265
de