What is sodium methoxide (CAS: 865-33-8) ?
Potassium methoxide solution(CAS: 865-33-8) is a widely used strong base and catalyst in industrial and laboratory applications, especially in biodiesel production, organic synthesis, and the pharmaceutical industry.
| Melting point | -20°C |
| Boiling point | 84°C |
| potassium methoxide density | 0.95 g/mL at 20 °C |
| refractive index | n20/D 1.37 |
| Fp | 7°C |
| storage temp. | Store below +30°C. |
| solubility | Soluble in methanol and ethanol. |
| form | Liquid |
| color | Clear colorless |
| Specific Gravity | 0.95 |
| PH | 12.8 (7g/l, H2O, 20ºC) |
| Water Solubility | may decompose |
| Sensitive | Moisture Sensitive |
| Hydrolytic Sensitivity | 7: reacts slowly with moisture/water |
| BRN | 3551544 |
Application Of Potassium Methoxide Solution
Potassium methoxide can be used:
- As a methoxylating agent for methoxylation of bromo- and mesyloxyalkanes in the presence of an ionic liquid.
- As a catalyst for the synthesis of dimethyl carbonate and methyl formate.
- As a catalyst for the transesterification of sunflower oil for the production of biodiesel.
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.
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