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Sigma-Aldrich

Sodium thiosulfate

ReagentPlus®, 99%

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5 G
$54.36
250 G
$65.97
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$151.20
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$290.00

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5 G
$54.36
250 G
$65.97
1 KG
$151.20
2.5 KG
$290.00

About This Item

Linear Formula:
Na2S2O3
CAS Number:
7772-98-7
Molecular Weight:
158.11
EC Number:
231-867-5
MDL number:
MFCD00003499
UNSPSC Code:
12352302
PubChem Substance ID:
329752199
NACRES:
NA.21
assay:
99%
form:
powder, crystals or chunks

$54.36

List Price$60.40Save 10%
Web-Only Promotion

Available to ship onMay 13, 2025Details

Request a Bulk Order

Quality Level

200

product line

ReagentPlus®

assay

99%

form

powder, crystals or chunks

pH

6.0-8.5 (20 °C, 50 g/L)

SMILES string

[Na+].[Na+].[O-]S([O-])(=O)=S

InChI

1S/2Na.H2O3S2/c;;1-5(2,3)4/h;;(H2,1,2,3,4)/q2*+1;/p-2

InChI key

AKHNMLFCWUSKQB-UHFFFAOYSA-L

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General description

Sodium thiosulfate is an inorganic salt composed of thiosulfate and sodium ion with the chemical formula Na2S2O3. It is general reducing agent and useful sulfur source in synthetic chemistry

Application

Applied in a widely useful, thiosulfate-assisted, synthesis of a variety of diamine-CuCN complexes.[1]
Sodium thiosulfate can be used as a
  • Component in the synthesis of unsymmetrical aryl sulfides under aqueous conditions, where C–S–C bond formed in presence of other two components (alcohols and organohalides).
  • Reagent for the activation of carbon material.
  • Reagent in the synthesis of S-glycosyl thiosulfates (glycosyl bunte salts) by direct condensation of unprotected sugars using dehydrating agent DMC (2-chloro-1,3-dimethylimidazolinium chloride) in water-acetonitrile solvent mixture.
  • Reagent with alkyl halide in the synthesis of Bunte salts by SN2 mechanism using Cu catalyst.
  • Reagent in the synthesis of aryl thiols from aryl halides by palladium catalyzed cross-coupling reaction.

Features and Benefits

Sodium thiosulfate is:
  • Stable
  • Environmentally friendly
  • Odorless
  • Inexpensive.

Legal Information

ReagentPlus is a registered trademark of Merck KGaA, Darmstadt, Germany

Storage Class

11 - Combustible Solids

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

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Certificates of Analysis (COA)

Lot/Batch Number
BCCM9793
MKCX4341
BCCM3722
MKCV5667
MKCW6011

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Xin Yan Hou et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 125, 285-289 (2014-02-22)
In this study, triangular silver nanoplates (TAg-NPs) were used to detect trace Cysteine concentration in the presence of sodium thiosulfate (Na2S2O3). Study showed that the TAg-NPs could be gently etched by Cysteine with the concentration of 1.0×10(-7) mol L(-1) through
Hongda Wang et al.
Light, science & applications, 9, 118-118 (2020-07-21)
Early identification of pathogenic bacteria in food, water, and bodily fluids is very important and yet challenging, owing to sample complexities and large sample volumes that need to be rapidly screened. Existing screening methods based on plate counting or molecular
Eagleson M.
Concise Encyclopedia Chemistry, 648-648 (1994)
Eagleson M.
Concise Encyclopedia Chemistry, 542-542 (1994)
Fred B. Stocker et al.
Inorganic chemistry, 38(5), 984-991 (2001-10-24)
A new synthetic procedure developed recently in our laboratories has made possible the synthesis of variety of new complexes of CuCN with diamines. Synthesis was effected by adding the ligand to a solution of CuCN in aqueous sodium thiosulfate. This
View All Related Papers

Questions

1–2 of 2 Questions  

  1. 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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  2. 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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