(a) Identity.

1. (1) The color additive D&C Yellow No. 11 is principally 2-(2-quinolyl)-1,3-indandione.
2. (2) Color additive mixtures, for drug use made with D&C Yellow No. 11 may contain only those diluents that are suitable and that are listed in part 73 of this chapter as safe for use in color additive mixtures for coloring externally applied drugs.

(b) Specifications. D&C Yellow No. 11 shall conform to the following specifications and shall be free from impurities, other than those named, to the extent that such other impurities may be avoided by good manufacturing practice:

Volatile matter (at 135 °C), not more than 1 percent. Ethyl alcohol-insoluble matter, not more than 0.4 percent. Phthalic acid, not more than 0.3 percent. Quinaldine, not more than 0.2 percent. Subsidiary colors, not more than 5 percent. Lead (as Pb), not more than 20 parts per million. Arsenic (as As), not more than 3 parts per million. Mercury (as Hg), not more than 1 part per million. Total color, not less than 96 percent.