HHC stands for hexahydrocannabinol. It is a hydrogenated form of THC that is found naturally in hemp but only in trace amounts 1. HHC has a more stable chemical structure and is more resistant to heat, light, and air than THC 1. HHC is obtained in a similar process that margarine manufacturers use to harden vegetable oils using a process known as hydrogenation, or adding hydrogen atoms to the chemical structure to make it stable.