|Molecular formula||(NH 4 ) 2 S 2 O 3|
white odorless solid
|External identifiers / databases|
|Molar mass||148.21 g mol −1|
1.679 g cm −3
150 ° C (decomposition)
|As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .|
Extraction and presentation
Ammonium thiosulphate can be obtained by reacting ammonium sulphite with sulfur or sulphides in aqueous solutions (partly with ammonia), oxidation of hydrogen sulphide , through reaction of ammonium hydrogen carbonate with sulfur dioxide .
Ammonium thiosulfate decomposes above 150 ° C, producing sulfur oxides, ammonia and nitrogen oxides.
Ammonium thiosulphate is used as a quick fixing salt (similar to sodium thiosulphate ) for the production of fixing baths in film technology, photo technology and X-ray technology and as a fertilizer.
- Data sheet ammonium thiosulfate (PDF) from Merck , accessed on March 17, 2010.
- Karl Heinz Büchel, Hans-Heinrich Moretto, Peter Woditsch: Industrial Inorganic Chemistry. ISBN 978-3-527-29849-5 .
- Process for the production of ammonium thiosulfate (Patent.de)
- Safety data sheet (fld-friedland) ( page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. (PDF; 45 kB)