Buy Benzocaine CAS 94-09-7. Buy Benzocaine HCl powder (CAS-23239-88-5) Buy Benzocaine HCl powder (CAS-23239-88-5). Benzocaine for sale, sold under the brand name Orajel amongst others, is an ester local anesthetic commonly used as a topical pain reliever or in cough drops. It is the active ingredient in many over-the-counter anesthetic ointments such as products for oral…