PK2835 Potassium Methoxide (CH3KO) Powder (CAS: 865-33-8)

Catalog No. PK2835
Molecular Formula CH3KO
CAS Number 865-33-8
Appearance White powder
Purity 95%

Potassium Methoxide Powder (CH3KO) (CAS: 865-33-8) is generally immediately available in most volumes. High purity, submicron and nano-powder forms may be considered. Stanford Advanced Materials has rich experience in offering high-quality Potassium Methoxide (CH3KO).

Related products:Potassium Acetate Powder; Potassium Chloride Powder; Potassium Cyanide Powder; Potassium Dicyanoargentate


Potassium Methoxide Powder Description:

Potassium Methoxide (CH3KO) (CAS: 865-33-8) is a white powder and used as a chemical intermediate. Potassium methoxide is the alkoxide of methanol with the counterion potassium and is used as a strong base and as a catalyst for transesterification, in particular for the production of biodiesel.

Potassium Methoxide Powder Specifications:

CAS Number


Molecular formula


Molecular weight

70.132 g/mol


White powder


0.85 g/cm3

Potassium Methoxide Powder Applications:

The main application of potassium methoxide is used as a basic transesterification catalyst in biodiesel synthesis (as a 25-32% methanolic solution). Triglycerides of vegetable and animal origin are reacted with methanol in the presence of alkali metal methanolates to form the corresponding fatty methyl esters.

Potassium methoxide allows a facilitated formation of fatty soaps in comparison to the (lower-priced) sodium methoxide (here potassium salts of the fatty acids from the triglycerides) and higher yields are obtained with potassium methoxide. The optimum conditions for biodiesel production from canola oil are reported as being 1.59% by weight of potassium methoxide, a reaction temperature of 50 °C and a methanol/oil ratio of 4.5: 1. The biodiesel yield is 95.8% with a fatty acid content of 0.75% by weight[1]

Safety information



Signal word


Hazard statements

H251 - H314

Precautionary statements

P235 - P260 - P280 - P303 + P361 + P353 - P305 + P351 + P338

Personal Protective Equipment

Eyeshields, Faceshields, Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges


UN 3206 8(4.2) / PGII

WGK Germany




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