2-Furanone, also known as γ-crotonolactone (GCL), is a heterocyclic organic compound. Classified as a lactone, this colourless liquid is colloquially called \"butenolide.\" As a class of compounds, substituted derivatives, which are not in fact prepared from the parent 2-furanone, are called butenolides.

CAS：497-23-4
中文别名：2-氧代-2,5-二氢呋喃;γ-巴豆酰内酯;
英文别名：2-Oxo-2,5-dihydrofuran;2H-furan-5-one;Furan-2(5H)-one;2(5H)-Furanone;γ-Crotonolactone;
分子式：C4H4O2
分子量：84.0734
精确质量：84.0211
Psa：26.3
Logp：0.0994

MDL号：MFCD00005376
EINECS号：207-839-3

密度：1.185g/mLat 25°C(lit.)
沸点：86-87°C12mm Hg(lit.)
熔点：4-5°C(lit.)
闪点：214°F
折射率：n20/D 1.469(lit.)
储存条件：2-8ºC
蒸汽压：0.273mmHg at 25°C

RTECS号：LU3453000
安全说明：S26
危险类别码：R36/37/38
WGK Germany：3
海关编码：29322980
包装等级：I; II; III
危险品标志：Xi

生产方法
1. 烟草:FC,9, 18;FC,BU,OR,40。