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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
S6672
Sodium thiosulfate pentahydrate
BioXtra, ≥99.5%
Synonym(s):
Disodium thiosulfate pentahydrate, Na2S2O3 · 5H2O
About This Item
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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
product line
BioXtra
assay
≥99.5%
impurities
≤0.0005% Phosphorus (P), ≤0.005% Insoluble matter
solubility
H2O: 1 M, clear, colorless
anion traces
sulfate (SO42-): ≤0.2%
cation traces
Al: ≤0.0005%, Ca: ≤0.0005%, Cu: ≤0.0005%, Fe: ≤0.0005%, K: ≤0.005%, Mg: ≤0.0005%, NH4+: ≤0.05%, Pb: ≤0.001%, Zn: ≤0.0005%
Quality Level
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This Item | S8503 | 217247 | 1.93648 |
|---|---|---|---|
| solubility H2O: 1 M, clear, colorless | solubility - | solubility water: soluble(lit.) | solubility - |
| assay ≥99.5% | assay ≥99.5% | assay ≥99.5% | assay - |
| Quality Level 200 | Quality Level 200 | Quality Level 200 | Quality Level - |
| anion traces sulfate (SO42-): ≤0.2% | anion traces - | anion traces S2-: passes test, SO42- and SO32-: ≤0.1% | anion traces - |
| cation traces Al: ≤0.0005%, Cu: ≤0.0005%, K: ≤0.005%, NH4+: ≤0.05%, Zn: ≤0.0005%, Ca: ≤0.0005%, Mg: ≤0.0005%, Fe: ≤0.0005%, Pb: ≤0.001% | cation traces - | cation traces N: ≤0.002% | cation traces - |
| impurities ≤0.0005% Phosphorus (P) | impurities - | impurities ≤0.002% N compounds, ≤0.005% insolubles | impurities - |
Application
- Preparation and characterization of sodium thiosulfate pentahydrate/expanded graphite phase change energy storage composites.: The research addresses issues such as high supercooling and phase separation in sodium thiosulfate pentahydrate by adding expanded graphite, significantly improving its thermal properties for energy storage applications (Lu et al., 2020).
- Surface free energy analysis for stable supercooling of sodium thiosulfate pentahydrate with microcosmic-visualized methods.: This paper presents a detailed analysis of supercooling stability in sodium thiosulfate pentahydrate, employing microcosmic-visualized methods to enhance its application in thermal energy storage systems (Peng et al., 2020).
Storage Class
13 - Non Combustible Solids
wgk
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
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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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