Potassium methoxide Chemical Properties

Melting point:

-20°C

Boiling point:

84°C

Density 

0.95 g/mL at 20 °C

vapor pressure 

0Pa at 25℃

refractive index 

n20/D 1.37

Flash point:

7°C

storage temp. 

Store below +30°C.

solubility 

Soluble in methanol and ethanol.

pka

15.17[at 20 ℃]

form 

Liquid

color 

Clear colorless

Specific Gravity

0.95

PH

12.8 (7g/l, H2O, 20℃)

Water Solubility 

may decompose

Sensitive 

Moisture Sensitive

Hydrolytic Sensitivity

7: reacts slowly with moisture/water

BRN 

3551544

Exposure limits

ACGIH: TWA 200 ppm; STEL 250 ppm (Skin)
OSHA: TWA 200 ppm(260 mg/m3)
NIOSH: IDLH 6000 ppm; TWA 200 ppm(260 mg/m3); STEL 250 ppm(325 mg/m3)

Stability:

Stable. Reacts violently with water. Moisture sensitive. Absorbs carbon dioxide from the air. Incompatible with acids, strong oxidizing agents, acid chlorides, acid anhydrides, alkali metals.

CAS DataBase Reference

865-33-8(CAS DataBase Reference)

EPA Substance Registry System

Methanol, potassium salt (865-33-8)

Safety Information

Hazard Codes 

F,T,C

Risk Statements 

11-14-34-67-65-63-48/20-39/23/24/25-38-23/24/25

Safety Statements 

8-16-26-43-45-62-46-36/37/39-33-29-25

RIDADR 

UN 3274 3/PG 2

WGK Germany 

1

F 

3-10-23

Autoignition Temperature

30 - 50 °C

TSCA 

Yes

HazardClass 

4.2

PackingGroup 

II

HS Code 

29051900

MSDS

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Potassium methoxide Usage And Synthesis

Chemical Properties

solid

Uses

Potassium methoxide is used as a chemical intermediate. It is also used in biodiesel production and in fuel additives. It acts as a catalyst for the preparation of methyl formate and an alkaline catalyst for dimethyl formamide. Further, it is used as versatile reagents in chemical reactions such as condensation, esterification, alkoxylation and etherification, Claisen condensation, Wolf-Kishner reduction and Stobbe reaction.

Fire Hazard

Flammable solid, igniting in moist air. Rapid addition in bulk amount into halogenated solvents may cause an explosion. Reaction with arsenic pentafluoride in benzene can result in explosion (Kolditz 1965).

Flammability and Explosibility

Flammable

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