The widely used pharmaceutical. compound I-epinephrine HCI (CAS# 55-31-2) is not on the TSCA 8B inventory. Epinephrine bitartrate (CAS# 51-. 42-3), which is used in medical applications as well, is also not listed on the TSCA 8B inventory. 3 See OSWER Directive 9441.1990(1), Memorandum from Devereux Barnes, EPA Office of Solid Waste (OSW) to. Steve Johnson, EPA Office of Pesticide Programs, February 9, 1990 (RCRA Online No. 11489).