THCA: Tetrahydrocannabinolic Acid, Differences from THC
THCA is the abbreviation for tetrahydrocannabinolic acid. It is a naturally occurring acidic cannabinoid in the cannabis plant and the direct precursor of Δ9-tetrahydrocannabinol, or Δ9-THC for short. The key difference lies in the chemical structure: compared with Δ9-THC, THCA has an additional carboxyl group. When this group is split off, Δ9-THC is formed with the release of carbon dioxide (CO₂).
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