[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: 21CFR178.3450] [Page 410-411] TITLE 21--FOOD AND DRUGS CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) PART 178_INDIRECT FOOD ADDITIVES: ADJUVANTS, PRODUCTION AIDS, AND SANITIZERS--Table of Contents Subpart D_Certain Adjuvants and Production Aids Sec. 178.3450 Esters of stearic and palmitic acids. The ester stearyl palmitate or palmityl stearate or mixtures thereof may be safely used as adjuvants in food-packaging materials when used in accordance with the following prescribed conditions: [[Page 411]] (a) They are used or intended for use as plasticizers or lubricants in polystyrene intended for use in contact with food. (b) They are added to the formulated polymer prior to extrusion. (c) The quantity used shall not exceed that required to accomplish the intended technical effect.