Sodium ethoxide, also known as sodium ethoxide, appears as a white to pale yellow hygroscopic powder or a pale yellow liquid (ethanol solution). It is strongly alkaline, readily absorbs moisture and decomposes to darken in air, and rapidly hydrolyzes in contact with water to form sodium hydroxide and ethanol. It must be strictly protected from moisture and stored in sealed containers.

1. As a strong basic catalyst in organic synthesis:Used in reactions such as Claisen condensation, transesterification, alkylation, etc.
2. As a pharmaceutical and pesticide intermediate:Used in the synthesis of pharmaceuticals, pesticides, fragrances and other chemicals.
3. For biodiesel production:Used as a catalyst in transesterification reactions.
4. As an ethoxylating agent and reducing agent:Used in organic synthesis and polymer polymerization.