4-Hydroxy-2,5-dimethyl-3(2H)furanone 3658-77-3

Appearance: white solid

Purity: 98% Min

M. P. : 73-77 °C(lit.)

B. P. : 188 °C

Flash point: >230 °F

Vapor pressure: 0.81Pa at 25℃

Refractive index: n20/D 1.439

The production method involves the condensation cyclization of 2-butene nitrile and ethyl lactate in the presence of a base, followed by the removal of HCN by reacting with KHSO4. It is formed by the oxidation, reduction, dimerization, dehydration, and cyclization of propylene glycol in the presence of zinc catalyst.