If you are like me you love
terpenes, those little unsaturated hydrocarbons are gorgeous bastards teaming with potential, utility and beauty. One of my favorites is
Limonene and it is found in a majority of the citrus species
We probably know or have at least heard about
Petrichor and the bacterial compound Geosmin (also found naturally in Beetroot btw) that we experience after a long hot period when rain suddenly occurs, but in using this material it would be the mark of a novice just to work the petrichor facet alone into our formula with no consideration of the other essential component that accompanies it. The other reaction that occurs, the necessary compliment is the reaction of the locally specific bacteria
in situ to the falling rain i.e. the area of land where the rain falls - every area smells different due to different bacteria.
When I designed Lightning Ridge the most difficult part of the construction was recreating not only the ozonic accord (not petrichor or bacterial, an entirely different design aspect and area of chemistry that accompanies lightning) but the bacterial component of the design - the smell that occurs when the rain strikes the parched, dry Australian earth based on my experiences as it growing up and living here. In a similar vein, when Will designed his Petrichor release he took his experience in New England and recreated what
he experienced over many years. So a good design using Geosmin is so very much more than just the Petrichor aspect, from a perfumery perspective using Petrichor alone is a really novice mistake and an example of very poor design and research.
This article on
The science of bottling the scent of rain discusses this area of perfumery and chemistry if you are interested. It's well referenced (with links to the papers), not at all technical or complex and a quick easy read.