Mercaptan

Mercaptan is a sulfur-containing volatile compound occasionally detected in cannabis samples, though it is not classified as a primary or secondary terpene in the conventional sense. The term refers to a family of organic compounds characterized by a thiol (-SH) functional group, known for pungent, savory aromas commonly associated with garlic, onion, or cooked meat. In cannabis genetics, mercaptan-like aromatic notes are rarely isolated or bred for deliberately; when present, they typically emerge as minor byproducts of fermentation, curing, or interaction with other volatile compounds. Detection remains challenging in standard terpene profiling, and its role in cannabis flavor or aroma expression requires further phytochemical research.

Most breeders do not actively select for mercaptan expression, as it is neither a primary cannabinoid nor a well-characterized terpene target. However, some artisanal cultivators and fermentation specialists study how sulfur-bearing volatiles develop during post-harvest processing, viewing them as markers of curing technique rather than genetic traits.