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
223492
Potassium sulfate
ACS reagent, ≥99.0%, powder
Select a Size
| Size/SKU | Availability | Price |
|---|---|---|
500 g | Check Cart for Availability | $138.00 |
2.5 kg | Check Cart for Availability | $750.00 |
About This Item
grade
ACS reagent
Quality Segment
agency
suitable for EPA 300
assay
≥99.0%
form
powder
impurities
≤0.01% insolubles, ≤5 ppm N compounds
pH
5.5-5.8 (25 °C, 5%)
solubility
water: soluble (120 g/l)
anion traces
chloride (Cl-): ≤0.001%
cation traces
Ca: ≤0.01%, Fe: ≤5 ppm, Mg: ≤0.005%, Na: ≤0.02%, heavy metals: ≤5 ppm (by ICP)
SMILES string
[K+].[K+].[O-]S([O-])(=O)=O
InChI
1S/2K.H2O4S/c;;1-5(2,3)4/h;;(H2,1,2,3,4)/q2*+1;/p-2
InChI key
OTYBMLCTZGSZBG-UHFFFAOYSA-L
General description
Application
1 of 1
This Item | |||
|---|---|---|---|
| description ACS reagent, ≥99.0%, powder | description ReagentPlus®, ≥99.0% | description BioUltra, ≥99.0% (AT) | description BioUltra, ≥99.0% (AT) |
| form powder | form powder | form solid | form solid |
| solubility water: soluble (120 g/l) | solubility water: soluble | solubility H2O: 0.5 M at 20 °C, clear, colorless | solubility H2O: 0.5 M at 20 °C, clear, colorless |
| assay ≥99.0% | assay ≥99.0% | assay ≥99.0% (AT) | assay ≥99.0% (AT) |
| Quality Level 200 | Quality Level 200 | Quality Level 200 | Quality Level 200 |
| grade ACS reagent | grade - | grade reagent grade | grade reagent grade |
| anion traces chloride (Cl-): ≤0.001% | anion traces - | anion traces phosphate (PO43-): ≤10 mg/kg, chloride (Cl-): ≤5 mg/kg | anion traces phosphate (PO43-): ≤10 mg/kg, chloride (Cl-): ≤5 mg/kg |
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Storage Class
13 - Non Combustible Solids
wgk
WGK 1
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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What is the average particle size (APS) of this powder?
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The particle size of this material has not been determined.
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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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