21 CFR §172.215

1. (a)The food additive is manufactured by the polymerization of a crude, heavy coal-tar solvent naphtha meeting the following specifications:
   1. (1)It is a mixture of indene, indan (hydrindene), substituted benzenes, and related compounds.
   2. (2)It contains no more than 0.25 percent tar bases.
   3. (3)95 percent distills in the range 167 °C-184 °C.
2. (b)The food additive meets the following specifications:
   1. (1)Softening point, ring and ball: 126 °C minimum as determined by ASTM method E28-67 (Reapproved 1982), “Standard Test Method for Softening Point by Ring-and-Ball Apparatus,” which is incorporated by reference. Copies may be obtained from the American Society for Testing Materials, 100 Barr Harbor Dr., West Conshohocken, Philadelphia, PA 19428-2959, or may be examined at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.
   2. (2)Refractive index (n 25/D) 1.63-1.64.
3. (c)It is used or intended for use as a protective coating for grapefruit, lemons, limes, oranges, tangelos, and tangerines whereby the maximum amount of the resin remaining on the fruit does not exceed 200 parts per million on a fresh-weight basis.
4. (d)To assure safe use of the additive:
   1. (1)The label of the market package or any intermediate premix of the additive shall bear, in addition to the other information required by the act:
      1. (i)The name of the additive, coumarone-indene resin.
      2. (ii)A statement of the concentration of the additive therein.
   2. (2)The label or accompanying labeling shall bear adequate directions that, if followed, will result in a finished food not in conflict with the requirements of this section.