[Code of Federal Regulations] [Title 21, Volume 1] [Revised as of April 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR58.83] [Page 309] TITLE 21--FOOD AND DRUGS CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES PART 58_GOOD LABORATORY PRACTICE FOR NONCLINICAL LABORATORY STUDIES--Table of Subpart E_Testing Facilities Operation Sec. 58.83 Reagents and solutions. All reagents and solutions in the laboratory areas shall be labeled to indicate identity, titer or concentration, storage requirements, and expiration date. Deteriorated or outdated reagents and solutions shall not be used.