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/418/501/product-dating-information-06-25-mk.pdf
217247
Sodium thiosulfate pentahydrate
ACS reagent, ≥99.5%
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$63.90
$84.20
$233.00
$63.90
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InChI key
PODWXQQNRWNDGD-UHFFFAOYSA-L
InChI
1S/2Na.H2O3S2.5H2O/c;;1-5(2,3)4;;;;;/h;;(H2,1,2,3,4);5*1H2/q2*+1;;;;;;/p-2
SMILES string
O.O.O.O.O.[Na+].[Na+].[O-]S([O-])(=O)=S
grade
ACS reagent
agency
suitable for EPA 1621, suitable for ISO 25101, suitable for SM 2310, suitable for SM 2320, suitable for SM 4500 - NH3
assay
≥99.5%
form
crystalline powder, crystals, pellets
impurities
≤0.002% N compounds, ≤0.005% insolubles
pH
6.0-8.4 (25 °C, 5%)
solubility
water: soluble(lit.)
anion traces
S2-: passes test, SO42- and SO32-: ≤0.1%
cation traces
N: ≤0.002%
application(s)
PFAS testing
Quality Level
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1 of 4
This Item | 1.06514 | 13479 | 1.93248 |
|---|---|---|---|
| form crystalline powder, pellets, crystals | form crystalline, solid | form crystalline | form - |
| assay ≥99.5% | assay - | assay 99.0-100.5% (USP, dry basis), 99.0-101.0% (EP) | assay - |
| solubility water: soluble(lit.) | solubility - | solubility - | solubility - |
| Quality Level 200 | Quality Level 500 | Quality Level 200 | Quality Level - |
| grade ACS reagent | grade - | grade - | grade ACS reagent |
| cation traces N: ≤0.002% | cation traces - | cation traces As: ≤3 mg/kg, Ca: ≤50 mg/kg, Fe: ≤10 mg/kg | cation traces - |
Application
- Thioester derivatives via one-pot two-step reactions with organic halides and aryl anhydrides.
- Sulfur nanoparticles using F. benghalensis leaf extract which acts as a reducing and capping agent.
- Unsymmetrical heteroaryl thioethers via multicomponent reaction with heteroaryl chlorides and alcohols.
It can also be used in the fabrication of microencapsulated phase change materials for thermal energy storage applications.
Features and Benefits
General description
Storage Class
13 - Non Combustible Solids
wgk
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
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This page is intended to make it easier to find the consumables you need based on the analytical method you’re using. Methods included on this page come from the EPA, Standard Methods and ASTM.
Las PFAS o «productos químicos eternos», persisten en el medio ambiente y pueden suponer un riesgo para la salud humana. Descubra nuestras herramientas de control medioambiental para cuantificación de las PFAS, para apoyar a los investigadores, reguladores y laboratorios en sus análisis de las PFAS.
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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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