Hydrogenation of tetrahydrocannabinols (Δ⁸- or Δ⁹-THC) leads to formation of a mixture of hexahydrocannabinols (HHCs) comprised of the 9(S)- and 9(R)-HHC diastereomers. These compounds retain some psychoactivity but avoid classification as THCs as well as any THC-related regulations. Separation of the HHC diastereomers is possible by chromatography (HPLC, GC), but identity can only be confirmed with verified reference standards. Cayman offers fully characterized reference standards to aid in the correct identification and differentiation of hydrogenated phytocannabinoids.