21 CFR § 82.3 - Definitions.

---
identifier: "/us/cfr/t21/s82.3"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "21 CFR § 82.3 - Definitions."
title_number: 21
title_name: "Food and Drugs"
section_number: "82.3"
section_name: "Definitions."
chapter_name: "FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES"
subchapter_number: "A"
subchapter_name: "GENERAL"
part_number: "82"
part_name: "LISTING OF CERTIFIED PROVISIONALLY LISTED COLORS AND SPECIFICATIONS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "21 U.S.C. 371, 379e, 379e note."
regulatory_source: "42 FR 15669, Mar. 22, 1977, unless otherwise noted."
cfr_part: "82"
---


# 82.3 Definitions.

For the purposes of this part:

(a)-(f) [Reserved]

(g) The term *alumina* means a suspension in water of precipitated aluminum hydroxide.

(h) The term *blanc fixe* means a suspension in water of precipitated barium sulfate.

(i) The term *gloss white* means a suspension in water of co-precipitated aluminum hydroxide and barium sulfate.

(j) The term *mixed oxides* means the sum of the quantities of aluminum, iron, calcium, and magnesium (in whatever combination they may exist in a coal-tar color) calculated as aluminum trioxide, ferric oxide, calcium oxide, and magnesium oxide.

(k)-(m) [Reserved]

(n) The term *externally applied drugs and cosmetics* means drugs and cosmetics which are applied only to external parts of the body and not to the lips or any body surface covered by mucous membrane.

(o)-(p) [Reserved]

(q) The definitions and interpretations of terms contained in section 201 of the Federal Food, Drug, and Cosmetic Act shall be applicable also to such terms when used in this part.