4-Hydroxypropranolol-D7 hydrochloride is deuterium-labeled 4-Hydroxypropranolol hydrochloride. 4-Hydroxypropranolol hydrochloride (T10150) is an active metabolite of Propranolol,with a potency comparable to Propranolol. It inhibits β1- and β2-adrenergic receptors (pA2s: 8.24 and 8.26).