[Code of Federal Regulations] [Title 21, Volume 3] [Revised as of April 1, 2005] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR182.2906] [Page 475] TITLE 21--FOOD AND DRUGS CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) PART 182_SUBSTANCES GENERALLY RECOGNIZED AS SAFE--Table of Contents Subpart C_Anticaking Agents Sec. 182.2906 Tricalcium silicate. (a) Product. Tricalcium silicate. (b) Tolerance. 2 percent. (c) Limitations, restrictions, or explanation. This substance is generally recognized as safe when used in table salt in accordance with good manufacturing practice.