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328650 Aldrich

Potassium tert-butoxide solution

1.0 M in THF

Synonym: Potassium tert-butylate, Potassium-2-methylpropan-2-olate solution

  • CAS Number 865-47-4

  • Linear Formula (CH3)3COK

  • Molecular Weight 112.21

  •  Beilstein Registry Number 3556712

  •  MDL number MFCD00012162

  •  PubChem Substance ID 24859391



Related Categories Materials Science, Micro/NanoElectronics, Potassium, Solution Deposition Precursors
form   liquid
concentration   1.0 M in THF
density   0.902 g/mL at 25 °C


Frequently Asked Questions

Frequently Asked Questions are available for this Product.


2 L in Sure/Seal™

20 L in steel drum

50, 500 mL in Sure/Seal™


Potassium tert-butoxide is used to prepare 3-potassiooxamethylpyridine catalyst. It is also used as a strong alkoxide base reagent.

General description

Potassium tert-butoxide solution is a strong non nucleophilic base. It is capable of deprotonating carbon and other Bronsted acids. Reagent solutions in tert-BuOh may be prepared by reacting anhydrous alcohol with potassium in nitrogen atmosphere.

Price and Availability

Safety & Documentation

Safety Information

Signal word 
Hazard statements 
Supplemental Hazard Statements 
May form explosive peroxides., Reacts violently with water.
UN 3129 8(4.3) / PGI
WGK Germany 
Flash Point(F) 
-2.2 °F
Flash Point(C) 
-19 °C


Certificate of Analysis

Certificate of Origin

Frequently Asked Questions

Which document(s) contains shelf-life or expiration date information for a given product?
If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis. These documents are located on the product detail page under Useful Links & Tools. Click on the following link to search for a Certificate of Analysis. Please click the following link to see the details on our Product Dating Information.
How do I get lot-specific information or a Certificate of Analysis?
A Certificate of Analysis is available by lot number and can be obtained through our Advanced Search Option: http://www.sigmaaldrich.com/catalog/AdvancedSearchPage.do
Does the Tetrahydrofuran used to make Product 328650, Potassium tert-butoxide solution, contain a stabilizer?
Yes, the THF contains about 0.025% butylated hydroxytoluene (BHT) as a stabilizer.
What gloves can I use to work with Product 328650, Potassium tert-butoxide solution?
We would recommend using Neoprene gloves such as Z402435, Z403407, Z402443, or Z402427.
How do I remove Product 328650, Potassium tert-butoxide solution, from the Sure-Seal bottle?
You can find information on the Sure-Seal packaging configuration at:  http://www.sigmaaldrich.com/etc/medialib/docs/Aldrich/Brochure/1/suresealbrochure.Par.0001.File.tmp/suresealbrochure.pdf 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. The link below contains a list of our non-coring needles:   http://www.sigmaaldrich.com/catalog/search/TablePage/13452074
How should Product 328650, Potassium tert-butoxide solution, be stored?
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.
What is the purity of Product 328650, Potassium tert-butoxide solution?
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.
How do I find price and availability?
There are several ways to find pricing and availability for our products.  Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers. 
What is the Department of Transportation shipping information for this product?
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, or search here. 
My question is not addressed here, how can I contact Technical Service for assistance?
Use the option to the right to "Ask a Question" by email of a Technical Service Scientist.
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Protocols & Articles


Acids and Bases

Acids and bases have been used by chemists for centuries, and are among the most fundamental reagents employed in synthetic organic chemistry. This Aldrich product line ranges from Brønsted and Lewis...
Chemfiles Volume 1 Article 3

Nanowire Synthesis: From Top-Down to Bottom-Up

David J. Hill, James F. Cahoon* Department of Chemistry, University of North Carolina at Chapel Hill, USA *Email: jfcahoon@unc.edu
David J. Hill, James F. Cahoon*
Material Matters, 2017, 12.1
Keywords: Absorption, Catalysis, Chemical vapor deposition, Deposition, Electronics, Melting, Microelectronics, Nanomaterials, Redox Reactions, Reductions, Semiconductor

Peer-Reviewed Papers


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