Certified reference material for research and forensic applications. Tested to contain < 0.3% Delta-9-THC on a dry weight basis, meeting the 2018 Farm Bill requirements to be a non-controlled substance in the U.S. Not for human or veterinary use. Chemical formula C20H26O4, molecular weight 330.4. CAS # 31932-13-5. Must be stored at -20C immediately upon reciept.