Colorless oily liquid, flammable, miscible with water. Soluble in methanol, ethanol, acetone, and slightly soluble in ether. Boiling point 228 ℃. Melting point 20.2 ℃. Flash point (open cup) 121 ℃. Relative density is 1.0171. The refractive index is 1.4461.
Mainly used for manufacturing tetrahydrofuran, y-butyrolactone, polyurethane, and thermoplastic engineering plastic PBT resin. It can also be used to prepare N-methyl-2-pyrrolidone, N-vinyl-2-pyrrolidone, and other pyrrolidone derivatives. It is also used to prepare vitamin B6, pesticides, herbicides, as well as solvents, plasticizers, lubricants, humidifiers, softeners, adhesives, and brighteners for various processes in the electroplating industry.