?- butyrolactone

[Chinese name] butyrolactone; ?- butyrolactone; ?- hydroxy-butyrolactone; 1,4-butyrolactone; 2 (3H) - dihydro furanone
[English name] butyrolactone; GBL, ?-BLO.
CAS: 96-48-0
EINECS Number: 202-509-5
[Structure or formula]
Molecular formula: C4H6O2
Molecular structure: a carbonyl group C, O atoms are sp2 hybrid orbitals to form ? bond. Other C, O atoms are sp3 hybrid orbitals to form ? bond.
[Relative molecular or atomic weight] 86.09
[Density] The relative density of 1.1253 (25/4 ?)
[Melting point (?)] - 43.53
[Boiling point (?)] 204
[] 1.4348 refractive index 15 ?
Community dielectric constant (20 ?) 39
Dipole moment (25 ? benzene): 13.74
Critical temperature: 436 ?
Critical pressure: 3.4 mPa.
Viscosity: 1.7 mPa.s 25 degrees C.
Tension: 52.3 mN / m 25 degrees C..
Flash Point: 98.3 (open cup).
Heat of vaporization (204 ?) (kj / mol): 52.3


Colorless, oily liquid with a ketone odor. Goods ph about 4.5.
Chemical properties: in a neutral medium stability, in hot alkaline hydrolysis easy to produce reversible
Content: 99.5% or more
Chemical Properties
Transparent colorless liquid. And common organic solvents and water miscible.
?- butyrolactone is a highly soluble, non-toxic and safe and convenient, use and management of high-boiling solvents, dyeing auxiliaries wool, nylon, acrylonitrile fibers. In organic synthesis, GBL also has a wide range of uses, it is a synthetic ?- pyrrolidone, N- methyl pyrrolidone, vinyl pyrrolidone, acetyl -?- butyrolactone, cyclopropylamine and other raw materials, synthetic pesticides, weed , drug piracetam, ciprofloxacin, vitamin B1, chlorophyll and other intermediates

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