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
590681
Potassium carbonate
powder, 99.99% trace metals basis
Synonym(s):
Carbonate of potash, Dipotassium carbonate
Select a Size
| Pack Size | SKU | Availability | Price |
|---|---|---|---|
| 5 g | Estimated to ship onApril 20, 2026fromMILWAUKEE | $62.80 $47.10 | |
| 25 g | Estimated to ship onApril 20, 2026fromMILWAUKEE | $201.00 |
About This Item
$47.10
List Price$62.80Save 25%Estimated to ship onApril 20, 2026Details
grade
anhydrous
assay
99.99% trace metals basis
form
powder
reaction suitability
core: potassium
impurities
≤150.0 ppm Trace Metal Analysis
mp
891 °C (lit.)
solubility
ethanol: insoluble(lit.)
density
2.43 g/mL at 25 °C
SMILES string
[K+].[K+].[O-]C([O-])=O
InChI
1S/CH2O3.2K/c2-1(3)4;;/h(H2,2,3,4);;/q;2*+1/p-2
InChI key
BWHMMNNQKKPAPP-UHFFFAOYSA-L
Application
1 of 1
This Item | |||
|---|---|---|---|
| form powder | form powder and chunks | form powder | form powder |
| assay 99.99% trace metals basis | assay 99.995% trace metals basis | assay ≥98% | assay ≥98% |
| solubility ethanol: insoluble(lit.) | solubility H2O: soluble 138 g/L at 20 °C (completely) | solubility - | solubility - |
| Quality Level 100 | Quality Level 200 | Quality Level 200 | Quality Level 100 |
| grade anhydrous | grade - | grade reagent grade | grade anhydrous, reagent grade |
| density 2.43 g/mL at 25 °C | density - | density - | density - |
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signalword
Warning
hcodes
Hazard Classifications
Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3
target_organs
Respiratory system
Storage Class
13 - Non Combustible Solids
wgk
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
dust mask type N95 (US), Eyeshields, Gloves
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Global Trade Item Number
| SKU | GTIN |
|---|---|
| 590681-5G | 04061832639611 |
| 590681-25G | 04061832639581 |
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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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