[Code of Federal Regulations] [Title 21, Volume 5] [Revised as of April 1, 2008] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR346.20] [Page 270] TITLE 21--FOOD AND DRUGS CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF PART 346_ANORECTAL DRUG PRODUCTS FOR OVER-THE-COUNTER HUMAN USE--Table of Contents Subpart B_Active Ingredients Sec. 346.20 Keratolytic active ingredients. The active ingredient of the product consists of any of the following when used within the concentration range established for each ingredient: (a) Alcloxa 0.2 to 2 percent. (b) Resorcinol 1 to 3 percent. [[Page 271]]