Coatings may be applied to fresh citrus fruit for protection of the fruit in accordance with the following conditions:
(a) The coating is applied in the minimum amount required to accomplish the intended effect.
(b) The coating may be formulated from the following components, each used in the minimum quantity required to accomplish the intended effect:
(1) Substances generally recognized as safe for the purpose or previously sanctioned for the purpose.
(2) One or more of the following:
| Component | Limitations |
|---|---|
| Fatty acids | Complying with § 172.860. |
| Oleic acid derived from tall oil fatty acids | Complying with § 172.862. |
| Partially hydrogenated rosin | Catalytically hydrogenated to a maximum refractive index of 1.5012 at 100 °C. Color of WG or paler. |
| Pentaerythritol ester of maleic anhydride-modified wood rosin | Acid number of 134-145; drop-softening point of 127 °C-173 °C; saponification number of less than 280; and a color of M or paler. |
| Do | Acid number of 176-186; drop-softening point of 110 °C-118 °C; saponification number of less than 280; and a color of M or paler. |
| Polyethylene glycol | Complying with § 172.820. As a defoamer and dispersing adjuvant. |
| Polyhydric alcohol diesters of oxidatively refined (Gersthofen process) montan wax acids | Complying with § 178.3770 of this chapter and having a dropping point of 77 to 83 °C (170.6 to 181.4 °F), as determined by ASTM Method D566-76 (Reapproved 1982), “Standard Test Method for Dropping Point of Lubricating Grease,” which is incorporated by reference (Copies are available from the American Society for Testing and Materials, 100 Barr Harbor Dr., West Conshohocken, Philadelphia, PA 19428-2959, or 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: |
| Sodium lauryl sulfate | Complying with § 172.822. As a film former. |
| Wood rosin | Color of K or paler. |
(3) In lieu of the components listed in paragraph (b) (2) and (4) of this section, the following copolymer and one or more of the listed adjuvants.
| Component | Limitations |
|---|---|
| Vinyl chloride-vinylidene chloride copolymer | As an aqueous dispersion containing a minimum of 75 percent water when applied. |
| Polyethylene glycol | Complying with § 172.820. As a defoamer and dispersing adjuvant. |
| Polyvinylpyrrolidone | As an adjuvant. |
| Potassium persulfate | Do. |
| Propylene glycol alginate | Do. |
| Sodium decylbenzenesulfonate | Do. |
(4) In lieu of the components listed in paragraph (b) (2) and (3) of this section, the following rosin derivative and either or both of the listed adjuvants:
| Component | Limitations |
|---|---|
| Calcium salt of partially dimerized rosin | Having a maximum drop-softening point of 197 °C and a color of H or paler. It is prepared by reaction with not more than 7 parts hydrated lime per 100 parts of partially dimerized rosin. The partially dimerized rosin is rosin that has been dimerized by sulfuric acid catalyst to a drop-softening point of 95 °C to 105 °C and a color of WG or paler. |
| Petroleum naphtha | As adjuvant. Complying with § 172.250. |
| Sperm oil | As adjuvant. |