With one molar equivalent of anhydrous HCl, the simple addition product 6a can be formed at low temperature in the presence of diethyl ether, but it is very unstable.

[7] For many years 6b (also called "artificial camphor") was referred to as "pinene hydrochloride", until it was confirmed as identical with bornyl chloride made from camphene.

[9] Monoterpenes, of which α-pinene is one of the principal species, are emitted in substantial amounts by vegetation, and these emissions are affected by temperature and light intensity.

[citation needed] α-Pinene is highly bioavailable, with 60% human pulmonary uptake and rapid metabolism or redistribution.

[16] These compounds are also present in significant levels in the finished, dried cannabis flower preparation commonly known as marijuana.

[citation needed] It likely demonstrates this activity due to its action as an acetylcholinesterase inhibitor, a class of compounds which are known to aid memory and increase alertness.

[19][additional citation(s) needed] α-Pinene also contributes significantly to many of the varied, distinct, and unique odor profiles of the multitude of marijuana strains, varieties and cultivars.