Procaine Hcl 51-05-8 Synonyms: Procaine Hydrochloride; CAS: 51-05-8 EINECS: 200-077-2 Assay: 99.0-101.0%. Standard: BP/USP Packing: 25kg/cardboard drum Character: White crystal to powder, Melting point 154-158, Water solubility soluble. Usage: Active Pharmaceutical Ingredient (API), Local anesthetic for infiltration anesthesia, nerve block, etc.