5-Hydroxy-4-methyl-2(5H)-furanone(CAS: 40834-42-2)

5-Hydroxy-4-methyl-2(5H)-furanone is a colorless to light yellow liquid with a sweet, almond-like odor. It has a molecular weight of 112.12 g/mol and a boiling point of 113-114°C. Soluble in water and ethanol. It is used in food flavoring and fragrances. Reacts readily with bases and oxidizing agents.

5-Hydroxy-4-methyl-2(5H)-furanone is typically synthesized by the condensation of 2-acetyl-3-methylfuran with hydroxylamine. The reaction is carried out in the presence of a base, such as sodium hydroxide, to enhance the reactivity. The yield is around 70-80% with good selectivity.

5-Hydroxy-4-methyl-2(5H)-furanone is primarily used in the food and fragrance industries. It serves as a flavoring agent, particularly in confectionery and baked goods, and as a component in perfumes and colognes. It also finds applications in the pharmaceutical and polymer industries for its unique properties.

5-Hydroxy-4-methyl-2(5H)-furanone should be handled with caution. Wear appropriate personal protective equipment (PPE), including gloves and safety goggles. Store in a cool, dry place away from heat and sources of ignition. In case of spill, neutralize with an acid or base before cleaning up. Always consult the Safety Data Sheet (SDS) for detailed handling instructions.