Δ4(8)-iso-THC (CRM) (Item No. 39955) is a certified reference material that is structurally similar to known phytocannabinoids.1 Δ4(8)-iso-THC has been found as an impurity in the conversion of cannabidiol (Item Nos. ISO60156 | 41217 | 90080) to Δ8-THC (Item Nos. ISO60158 | 41193 | 14042) or Δ9-THC (Item Nos. ISO60157 | 9003771 | 12068). This product is intended for research and forensic applications.WARNING This product is not for human or veterinary use.