CBNA

CBNA is cannabinolic acid. It is the acid form of CBN. It forms when THCA in stored plant material slowly breaks down with light, air, and time, the same way THC breaks down into CBN.

The plant does not make CBNA directly. It is an aging product, so fresh flower has almost none. Heat and time can also remove a carboxyl group from CBNA, which turns it into neutral CBN.

On lab sheets CBNA is only occasionally listed, usually when the lab runs an expanded panel. When it does appear, it sits near CBN and the other acid forms. When the level is too low to measure, the line is left blank or marked as not detected.

In reference libraries, CBNA is recorded mainly by its name, its place as an aging product, and its relationship to CBN and THCA. This page covers the name, the acid and neutral pair, and how both appear on lab reports.

See also the Cannabinoids hub and the pages for CBN and THCA.