§ 172.215 Coumarone-indene resin.
The food additive coumarone-indene resin may be safely used on grapefruit, lemons, limes, oranges, tangelos, and tangerines in accordance with the following prescribed conditions:
（a） The food additive is manufactured by the polymerization of a crude, heavy coal-tar solvent naphtha meeting the following specifications:
（1） It is a mixture of indene, indan （hydrindene）, substituted benzenes, and related compounds.
（2） It contains no more than 0.25 percent tar bases.
（3） 95 percent distills in the range 167 °C–184 °C.
（b） The food additive meets the following specifications:
（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） Refractive index （ n 25 / D ） 1.63–1.64.
（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.
（d） To assure safe use of the additive:
（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:
（i） The name of the additive, coumarone-indene resin.
（ii） A statement of the concentration of the additive therein.
（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.
[42 FR 14491, Mar. 15, 1977, as amended at 49 FR 10103, Mar. 19, 1984]
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