Benzocaine Powder is a local anesthetic applied topically to the skin and mucous membranes; also used to suppress the gag reflex in various procedures. Benzocaine is the ethyl ester of p-aminobenzoic acid (PABA). CAS: 94-09-07 Formula: C9H11NO2 Molecular weight: 165.19 Compound purity: 99.9% Appearance: Powder