[Code of Federal Regulations] [Title 31, Volume 3] [Revised as of July 1, 2005] From the U.S. Government Printing Office via GPO Access [CITE: 31CFR540.318] [Page 220] TITLE 31--MONEY AND FINANCE: TREASURY CHAPTER V--OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY PART 540_HIGHLY ENRICHED URANIUM (HEU) AGREEMENT ASSETS CONTROL REGULATIONS--Table of Contents Subpart C_General Definitions Sec. 540.318 Uranium Hexafluoride (UF6). The term uranium hexafluoride or UF6 means a compound of uranium and fluorine.