3-Pentanone (also known as diethyl ketone) is a simple, symmetrical dialkyl ketone. It is a colorless liquid ketone with an odor like that of acetone. It is soluble in about 25 parts water, but miscible with organic solvents. It is mainly used as a solvent in paint and a precursor to vitamin E. It is easily soluble in diethyl ether and partially soluble in acetone, methanol, and water. Two related and more important ketones are 2-pentanone and methyl isopropyl ketone.

CAS：96-22-0
中文别名：二乙基甲酮;1,3-二甲基丙酮;3-戊酮;
英文别名：dimethyl acetal of 3-hydroxyisovaleric aldehyde;PENTANONE (3-) (AKA DEK);DIETHYL KETONE FOR SYNTHESIS;2-Butanol,4,4-dimethoxy-2-methyl;3-hydroxy-3-methylbutanal dimethyl acetal;dimethylacetal of 3-methyl-3-hydroxy butyraldehyde;DIETHYL KETONE (3-PENTANONE);ethyl ketone;DIETHYLKETONE;DIETHYL KETONE;3-PENTANON;4,4-Dimethoxy-2-methyl-2-butanol;3-PENTANOL;diethylketone;3-hydroxy-isovaleraldehyde dimethyl acetal;3-Pentanone;3-PENTANONE/DIETHYL KETONE;3-hydroxy-isovaleraldehyd dimethyl acetale;dimethylacetone;3-hydroxyisovaleric aldehyde dimethyl acetal;
分子式：C5H10O
分子量：86.1323
精确质量：86.0732
Psa：17.07
Logp：1.3755

UNII：9SLZ98M9NK

外观与性状：无色至淡黄色液体
密度：0.815
沸点：101.5°C(lit.)
熔点：-40 °C
闪点：55°F
折射率：n20/D 1.392(lit.)
水溶解性：50 g/L (20 ºC)
稳定性：Stable. Highly flammable. Readily forms explosive mixtures with air. Incompatible with strong bases, reducing agents, strong oxidizing agents.
储存条件：库房通风低温干燥,与氧化剂分开存放
蒸汽密度：3 (vs air)
蒸汽压：20 mm Hg ( 28 °C)

RTECS号：SA8050000
安全说明：S9-S16-S25-S33
危险类别码：R11; R37; R66; R67
WGK Germany：1
危险品运输编码：UN 1156 3/PG 2
海关编码：2914190090
危险类别：3
包装等级：II
危险品标志：F
信号词：Danger
危险性防范说明：P210; P305 + P351 + P338; P370 + P378; P403 + P235
危险标志：GHS02, GHS07
危险性描述：H225; H319; H335; H336
补充危害声明：反复暴露可能引起皮肤干燥或开裂。

生产方法
1.由3-戊醇氧化而得。氧化反应在90℃进行,反应后进行过滤,然后分馏收集101-104℃馏分,即为成品。 用作溶剂，也是药物合成的中间体。
用途
用作溶剂，也是药物合成的中间体。