[Code of Federal Regulations] [Title 21 Volume 5] [Revised as of April 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR358.510] [Page 295] 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 F--Corn and Callus Remover Drug Products Sec. 358.510 Corn and callus remover active ingredients. The product consists of any of the following active ingredients within the specified concentrations and in the dosage form established for each ingredient. (a) Salicylic acid 12 to 40 percent in a plaster vehicle. (b) Salicylic acid 12 to 17.6 percent in a collodion-like vehicle.