Originally Posted by Chris Bartlett
There is an essential oil of cannabis sativa flowers
that is widely available
and is produced mainly for the perfumery market. Depending on the cannabis variety it can be either virtually free of THC or high in it - the latter would not be legal in the UK but the former meets the Home Office rules and can be sold freely.
I understand however that the essential oil does contain the aromatic substance (caryophyllene oxide) used to train dogs to sniff out illegal cannabis . . .
Hemp oil is different - that's made from the seeds and is used in cooking among other things - it has no appreciable aroma.
Interesting... I'd think that any decent oil would necessarily have to be high in thc. Low-thc plants tend to have a much more green, vegetal, grassy, chlorophyll-like smell. A high quality drug cultivar has a much higher concentration of terpenes, and THC is a very similar molecule, so separating the two would be difficult. Also, a properly cured high-quality strain will have little to no green, grassy or hay-like smell to it. It is possible to find such a plant, but this characteristic was deemed negative and bred out of most of today's cannabis strains, along with smells reminiscent of halitosis, skunk, bad BO, diesel, gasoline and some others. From what I've heard, varieties with the diesel/fuel smell are actually getting very popular, and many people like the skunky smell, which was all but eliminated from weed bred in Holland.