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]