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
72049
Sodium thiosulfate
purum p.a., anhydrous, ≥98.0% (RT)
Select a Size
| Size/SKU | Availability | Price |
|---|---|---|
250 g | Available to ship TODAYfromMILWAUKEE | $88.00 |
1 kg | Available to ship TODAYfromMILWAUKEE | $195.00 |
About This Item
$88.00
Available to ship TODAYDetails
Quality Segment
grade
purum p.a.
assay
≥98.0% (RT)
form
crystals
pH
6.0-8.5 (25 °C, 50 mg/mL in H2O)
anion traces
sulfide (S2-): ≤50 mg/kg
cation traces
Ca: ≤50 mg/kg, Cd: ≤50 mg/kg, Co: ≤50 mg/kg, Cu: ≤50 mg/kg, Fe: ≤50 mg/kg, K: ≤500 mg/kg, Ni: ≤50 mg/kg, Pb: ≤50 mg/kg, Zn: ≤50 mg/kg
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
General description
Application
- Industrial synthesis of methylene blue.
- Quantitative estimation of elemental iodine by titrimetry.
- Detection of trace levels of cysteine by employing triangular silver nanoplates (TAg-NPs).[1]
1 of 1
This Item | |||
|---|---|---|---|
| form crystals | form powder | form powder | form solid |
| assay ≥98.0% (RT) | assay 99% | assay ≥99.99% trace metals basis | assay ≥97.0% (iodometric) |
| grade purum p.a. | grade - | grade - | grade - |
| cation traces Ca: ≤50 mg/kg, Co: ≤50 mg/kg, Fe: ≤50 mg/kg, Ni: ≤50 mg/kg, Zn: ≤50 mg/kg, Cd: ≤50 mg/kg, K: ≤500 mg/kg, Pb: ≤50 mg/kg, Cu: ≤50 mg/kg | cation traces - | cation traces - | cation traces Fe: ≤0.005%, heavy metals (as Pb): ≤0.005% |
| pH 6.0-8.5 (25 °C, 50 mg/mL in H2O) | pH 6-8.5 (20 °C, 50 g/L) | pH - | pH 6.0-9.5 (20 °C, 50 g/L in H2O) |
| anion traces sulfide (S2-): ≤50 mg/kg | anion traces - | anion traces - | anion traces sulfide (S2-): ≤0.002% |
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Storage Class
13 - Non Combustible Solids
flash_point_f
Not applicable
flash_point_c
Not applicable
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How can I determine the shelf life / expiration / retest date of this product?
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How is shipping temperature determined? And how is it related to the product storage temperature?
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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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