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
328650
Potassium tert-butoxide solution
1.0 M in THF
Synonym(s):
Potassium tert-butylate, Potassium-2-methylpropan-2-olate solution
Select a Size
| Size/SKU | Availability | Price |
|---|---|---|
50 mL | Available to ship TODAYfromMILWAUKEE | $74.80 |
500 mL | Available to ship TODAYfromMILWAUKEE | $310.00 |
2 L | Available to ship TODAYfromMILWAUKEE | $903.00 |
20 L | Available to ship TODAYfromMILWAUKEE | $3,320.00 |
About This Item
$74.80
Available to ship TODAYDetails
form
liquid
Quality Segment
reaction suitability
core: potassium
concentration
1.0 M in THF
density
0.902 g/mL at 25 °C
SMILES string
[K+].CC(C)(C)[O-]
InChI
1S/C4H9O.K/c1-4(2,3)5;/h1-3H3;/q-1;+1
InChI key
LPNYRYFBWFDTMA-UHFFFAOYSA-N
General description
Application
- As a catalyst for the interesterification of rapeseed oil with methyl acetate.
- To promote Sommelet–Hauser rearrangements of N-benzylic amino acid-derived ammonium ylides under mild conditions.
- As a metal-organic precursor in the synthesis of KNbO3 ferroelectric films by the chemical vapor deposition method.
- To prepare 3-potassiooxamethylpyridine catalyst.
- As a strong alkoxide base reagent.
1 of 1
This Item | |||
|---|---|---|---|
| form liquid | form liquid | form solid | form - |
| concentration 1.0 M in THF | concentration 2 M in THF | concentration - | concentration ~25% in toluene (T, ~1.7 M) |
| density 0.902 g/mL at 25 °C | density 0.920 g/mL at 25 °C | density - | density 0.90 g/mL at 20 °C |
| Quality Level 200 | Quality Level 100 | Quality Level 100 | Quality Level 200 |
| reaction suitability core: potassium | reaction suitability - | reaction suitability core: potassium | reaction suitability - |
signalword
Danger
Hazard Classifications
Acute Tox. 4 Oral - Carc. 2 - Eye Dam. 1 - Flam. Liq. 2 - Skin Corr. 1A - STOT SE 3
target_organs
Central nervous system, Respiratory system
supp_hazards
Storage Class
4.3 - Hazardous materials which set free flammable gases upon contact with water
flash_point_f
-2.2 °F - closed cup
flash_point_c
-19 °C - closed cup
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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?
1 answer-
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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Potassium tert-butoxide solution in THF 1M solution is bottle with sure-seal or not?
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Yes, the 50mL, 500mL, and 2L sizes are packaged in amber glass bottles with a Sure/Seal cap. The 20L size is packaged in a steel drum.
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What type of container does this ship in? 328650-20L
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Item 328650-20L is packaged in a Carbon Steel Drum that includes a 2-in. and a 3/4-in. opening. Each opening is capped and sealed with a polypropylene tamper-evident seal. See the attached image below.
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Does the Tetrahydrofuran used to make Product 328650, Potassium tert-butoxide solution, contain a stabilizer?
1 answer-
Yes, the THF contains about 0.025% butylated hydroxytoluene (BHT) as a stabilizer.
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What gloves can I use to work with Product 328650, Potassium tert-butoxide solution?
1 answer-
We would recommend using Neoprene gloves such as Z402435, Z403407, Z402443, or Z402427.
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What is the purity of Product 328650, Potassium tert-butoxide solution?
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We do not perform overall purity testing on this solution. The product is prepared with reagent grade potassium tert-butoxide and then titrated with hydrochloric acid to define the concentration during the quality control analysis.
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What is the Department of Transportation shipping information for this product?
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Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.
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How do I remove Product 328650, Potassium tert-butoxide solution, from the Sure-Seal bottle?
1 answer-
The Sure-Seal bottle has a septum held in place with a metal crimp cap. We would recommend removing the product by piercing the septum and withdrawing the liquid through a syringe to reduce the compound's exposure to air and moisture. We offer a line of non-coring syringe needles that are ideal for piercing septa.
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How should Product 328650, Potassium tert-butoxide solution, be stored?
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Room temperature storage is acceptable for this solution but we would recommend storing this product under nitrogen. The solution can decompose upon exposure to air or moisture. It also can absorb carbon dioxide from the air which will affect quality of the product.
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