DEA exempt certified reference material, delta 9-Tetrahydrocannabinolic Acid A (THCA-A), 1000 µg/mL, in acetonitrile, 1mL ampule. CAS 23978-85-0. Shipped on ice, must be stored at –20 °C or colder immediately upon receipt. Minimum shelf life on ship date: 6 months, maximum: 36 months. Replacement for REST-34093.