What is Delta-9? 

The chemical formula of delta-9 is C₂₁H₃₀O₂. This is the same as delta-8, except that one of the carbon-carbon double bonds is in a different position.

The majority of research on THC specifically looks at delta-9, so it’s the most well-studied and well-known form of THC.  So what is Delta-9? In an article medically reviewed by Dominique Fontaine, BSN, RN, HNB-BC, HWNC-BC — By Sian Ferguson on October 6, 2022, Cannabis and hemp plants consist of dozens of cannabinoids. Cannabinoids are chemicals that affect the body in various ways. Two well-known cannabinoids are cannabidiol (CBD) and tetrahydrocannabinol (THC).