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Sigma-Aldrich

Ammonium thiosulfate

98%

Synonym(s):

Diammonium thiosulfate

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About This Item

Linear Formula:
(NH4)2S2O3
CAS Number:
7783-18-8
Molecular Weight:
148.21
EC Number:
231-982-0
MDL number:
MFCD00015965
UNSPSC Code:
12352302
eCl@ss:
38030427
PubChem Substance ID:
24860416
NACRES:
NA.23

Quality Level

200

Assay

98%

form

crystals and lumps

mp

150 °C (lit.)

solubility

H2O: very soluble(lit.)
ethanol: insoluble(lit.)

density

1.679 g/mL at 25 °C (lit.)

SMILES string

N.N.OS(O)(=O)=S

InChI

1S/2H3N.H2O3S2/c;;1-5(2,3)4/h2*1H3;(H2,1,2,3,4)

InChI key

XYXNTHIYBIDHGM-UHFFFAOYSA-N

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General description

Ammonium thiosulfate is a non-toxic inorganic compound that is majorly used as a fertilizer and can be used as an alternative to cyanide based leaching. It has a hygroscopic nature and is soluble in water. It can be produced by the reaction of ammonia, water, and sulfur dioxide. It can be used as a photographic fixing salt.

Application

Ammonium thiosulfide can be used as a source of sulfur for the formation of cadmium sulfide thin films for electronic applications. It can also be used in the treatment of copper-gold ores for the recovery of gold.

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Sulfites, thiosulfates, and dithionites
Barbera JJ, et al.
Ullmann's Encyclopedia of Industrial Chemistry, 66(1-3), 1-21 (2000)
Fabio N Moreno et al.
Environmental pollution (Barking, Essex : 1987), 136(2), 341-352 (2005-04-21)
Experiments were carried out in plant growth chambers and in the field to investigate plant-mercury accumulation and volatilisation in the presence of thiosulphate (S2O3)-containing solutions. Brassica juncea (Indian mustard) plants grown in Hg-contaminated Tui mine tailings (New Zealand) were enclosed
Jianxu Wang et al.
Journal of hazardous materials, 186(1), 119-127 (2010-12-03)
According to the 'hard and soft' acid-base principle, mercury is a 'soft metal' and will preferentially form soluble chemical complexes with sulphur-containing ligands. In this work mercury uptake by Chenopodium glaucum L. growing on mercury-contaminated soil was promoted using ammonium
[Primary toxicological evaluation of ammonium thiosulfate].
Iu N Talakin et al.
Gigiena truda i professional'nye zabolevaniia, (6)(6), 54-55 (1982-06-01)
Ruijun Qin et al.
Journal of agricultural and food chemistry, 55(20), 8193-8199 (2007-09-13)
Low permeability tarps can effectively minimize fumigant emissions while improving fumigation efficacy by retaining fumigants under the tarp. However, when planting holes are cut through the tarps, high-concentration fumigants may be released and result in environmental and worker safety hazards.
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