What Exactly Is HHC? A Guide to Cannabinoid HHC What Exactly is HHC? Hexahydrocannabinol, abbreviated as HHC, is a hydrogenated form of the cannabinoid THC present in natural cannabis. When chemically hydrogenated from THC, HHC is also classified as semi-synthetic. It is thought to be 70-80% as potent as THC, indicating that it is more potent than Delta 8 and Delta 10. Low to moderate doses of HHC For Sale have euphoric effects similar to THC, but it also has relaxing and sedative qualities similar to Delta 8.