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：99-84-3
中文别名：
英文别名：4-methylene-1-(1-methylethyl)cyclohexene;b-terpinene;EINECS 202-793-0;4-methylidene-1-(propan-2-yl)cyclohexene;Cyclohexene, 4-methylene-1-(1-methylethyl)-;p-mentha-1(7),3-diene;Cyclohexene,4-methylene-1-(1-methylethyl);beta-terpinene;menthadiene-1(7),3;4-methylidene-1-propan-2-ylcyclohexene;
分子式：C10H16
分子量：136.234
精确质量：136.125
Psa：0.0
Logp：3.3089

UNII：DV74J5RW4Y

密度：0.83g/cm3
沸点：173.5ºC at 760mmHg
闪点：46.5ºC
折射率：1.466

海关编码：2902199090