[Code of Federal Regulations] [Title 21, Volume 5] [Revised as of April 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR349.16] [Page 284] TITLE 21--FOOD AND DRUGS CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) PART 349_OPHTHALMIC DRUG PRODUCTS FOR OVER-THE-COUNTER HUMAN USE--Table of Subpart B_Active Ingredients Sec. 349.16 Ophthalmic hypertonicity agent. The active ingredient and its concentration in the product is as follows: Sodium chloride, 2 to 5 percent.