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Sigma-Aldrich

Ammonium thiosulfate

98%

Synonym(s):

Diammonium thiosulfate

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500 G
$60.20
2.5 KG
$243.00

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500 G
$60.20
2.5 KG
$243.00

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

$60.20

Available to ship onApril 29, 2025Details

Request a Bulk Order

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.[1][2]

Application

Ammonium thiosulfide can be used as a source of sulfur for the formation of cadmium sulfide thin films for electronic applications.[3] It can also be used in the treatment of copper-gold ores for the recovery of gold.[4]

Storage Class

11 - Combustible Solids

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

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Certificates of Analysis (COA)

Lot/Batch Number
SDBB2425
STBK6971
STBK9586
STBK3035
STBK1582

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Sulfites, thiosulfates, and dithionites
Barbera JJ, et al.
Ullmann's Encyclopedia of Industrial Chemistry, 66(1-3), 1-21 (2000)
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)
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)
L Cassina et al.
Journal of hazardous materials, 231-232, 36-42 (2012-07-10)
Mercury-contaminated soils from a petrochemical plant in southern Italy were investigated to assess the phytoextraction efficiency of crop plants treated with the phytohormone, cytokinine (CK foliar treatment), and with the thioligand, ammonium thiosulfate (TS, soil application). Plant biomass, evapotranspiration, Hg
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Questions

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  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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