---
kind: "section"
citation: "21 C.F.R. § 172.215"
title: "21"
number: "172.215"
heading: "Coumarone-indene resin."
url: "https://uscodex.org/cfr/21/172.215"
---

# §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.

## Notes

### Amendments

[42 FR 14491, Mar. 15, 1977, as amended at 49 FR 10103, Mar. 19, 1984]

### Authority

Authority: 21 U.S.C. 321, 341, 342, 348, 371, 379e.

### Source

Source: 42 FR 14491, Mar. 15, 1977, unless otherwise noted.

### Amendments

[42 FR 14491, Mar. 15, 1977, as amended at 49 FR 10103, Mar. 19, 1984]