21 C.F.R. § 73.295
(a) Identity.
(b) Specifications.
(2) Tagetes (Aztec marigold) extract shall be prepared from tagetes (Aztec marigold) petals meeting the specifications set forth in paragraph (b)(1) of this section and shall conform to the following additional specifications:
| Melting point | 53.5-55.0 °C. |
| Iodine value | 132-145. |
| Saponification value | 175-200. |
| Acid value | 0.60-1.20. |
| Titer | 35.5-37.0 °C. |
| Unsaponifiable matter | 23.0 percent-27.0 percent. |
| Hexane residue | Not more than 25 p.p.m. |
All determinations, except the hexane residue, shall be made on the initial extract of the flower petals (after drying in a vacuum oven at 60 °C. for 24 hours) prior to the addition of the oils and ethoxyquin. The hexane determination shall be made on the color additive after the addition of the vegetable oils, hydrogenated vegetable oils, and ethoxyquin.
(c) Uses and restrictions. The color additives tagetes (Aztec marigold) meal and extract may be safely used in chicken feed in accordance with the following prescribed conditions:
(2) The quantity of the color additives incorporated in the feed is such that the finished feed:
(d) Labeling requirements. The label of the color additives and any premixes prepared therefrom shall bear, in addition to the information required by § 70.25 of this chapter: