The terpinenes are a group of isomeric hydrocarbons that are classified as terpenes. They each have the same molecular formula and carbon framework, but they differ in the position of carbon-carbon double bonds. α-Terpinene has been isolated from cardamom and marjoram oils, and from other natural sources. β-Terpinene has no known natural source, but has been prepared synthetically from sabinene. γ-Terpinene and δ-terpinene (also known as terpinolene) are natural and have been isolated from a variety of plant sources.

CAS：99-85-4
中文别名：γ-萜品烯,松油烯;1-甲基-4-(1-异丙基)-1,4-环己二烯;1-甲基-4-(1-甲基乙基)-1,4-环己二烯;γ-萜品烯;
英文别名：1-methyl-4-propan-2-ylcyclohexa-1,4-diene;gamma-terpinene;1,4-Cyclohexadiene, 1-methyl-4-(1-methylethyl)-;p-Mentha-1,4-Diene;
分子式：C10H16
分子量：136.234
精确质量：136.125
Psa：0.0
Logp：3.3089

UNII：4YGF4PQP49

外观与性状：无色至淡黄色液体
密度：0.85g/mLat 25°C(lit.)
沸点：182°C(lit.)
熔点：60-61ºC
闪点：125°F
折射率：n20/D 1.474(lit.)
储存条件：2-8ºC
蒸汽密度：4.7 (vs air)
蒸汽压：~0.7 mm Hg ( 20 °C)

RTECS号：OS8070000
安全说明：S26; S36
WGK Germany：2
危险类别码：R10; R36/37/38
海关编码：2902199090
危险品运输编码：UN 2319 3/PG 3
危险类别：3.2
包装等级：III
危险品标志：Xi
信号词：Warning
危险标志：GHS02, GHS07
危险性描述：H226; H315; H319; H335
危险性防范说明：P261; P305 + P351 + P338

生产方法
由马缨丹(Lantana camara)精油分离而得。 由对异丙基甲苯在液氨中用乙醇和钠反应(Birch反应)而得。 本品广泛用于调配香精及复配精油。
用途
本品广泛用于调配香精及复配精油。