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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

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)
Adsorption of Copper from an Ammonia-Thiosulfate Media Using DOWEX 550A Ion Exchange Resin
Vargas C and Navarro P
International Journal of Nonferrous Metallurgy, 5(04), 33-33 (2016)
The treatment of copper-gold ores by ammonium thiosulfate leaching
Molleman E and Dreisinger D
Hydrometallurgy, 66(1-3), 1-21 (2002)
Electro-plating and characterisation of cadmium sulphide thin films using ammonium thiosulphate as the sulphur source
Abdul-Manaf NA, et al.
Journal of Materials Science: Materials in Electronics, 26(4), 2418-2429 (2015)
Jason A McDonald et al.
Environmental science & technology, 42(2), 398-402 (2008-02-21)
Reducing fumigant emissions is required for minimizing bystander risk and environmental impact. Effective and economic field management methods including commonly used surface sealing technique and soil amendments are needed for achieving emission reductions. This research determined the effectiveness of ammonium
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