[Code of Federal Regulations] [Title 21, Volume 5] [Revised as of April 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR358.110] [Page 309] TITLE 21--FOOD AND DRUGS CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) PART 358_MISCELLANEOUS EXTERNAL DRUG PRODUCTS FOR OVER-THE-COUNTER HUMAN USE--Table of Contents Subpart B_Wart Remover Drug Products Sec. 358.110 Wart remover active ingredients. The product consists of any of the following active ingredients within the specified concentration and in the dosage form established for each ingredient. (a) Salicylic acid 12 to 40 percent in a plaster vehicle. (b) Salicylic acid 5 to 17 percent in a collodion-like vehicle. (c) Salicylic acid 15 percent in a karaya gum, glycol plaster vehicle.