21 Code of federal regulations

Code of Federal Regulations, Tide 29, Section 1910.1000 (Sept. 1989). 

Air Contaminants—Permissible Exposure Limit," Title 29 Code of Federal Regulations Part CFR 1910.1000, OSHA, 1989, p. 3112. 

Hazardous Materials Table, Code of Federal Regulations 49CFR 172.101 (revisedNov. 1989). 

Code of Federal Regulations, Tide 21, part 500—599, and Federal Register, Superintendent for Documents, U.S. Government Printing Office, Washington, D.C. 

According to the U.S. Code of Federal Regulations, food additives may be defined as "substances. .. the intended use of which results or may reasonably be expected to result, directly or indirectly, either in their becoming a component of food or otherwise affecting the characteristics of food" (1). Canada and the European Community have adopted similar definitions. According to this broad definition, a food additive is synonymous to a food ingredient. In practice, however, the word additive is limited to substances that are used in small quantities. 

Hair Coloring Regulation Issues. In the United States the classification of color additives is complex. Under the Federal Food, Dmg and Cosmetic Act, all cosmetic colors must be the subject of an approved color additive petition to the Food and Dmg Administration there is an exception for coal-tar colorants used to color hair. Based on the composition of these colorants, FDA can require a certification on each manufactured batch of colorant to assure conformance with the approved specifications. In the early 1990s FDA has required certification only for synthetically derived coal-tar type colors. Many of the approved color additives, both certified and noncertified, are restricted ia their potential use. These restrictions can be found ia the color additive regulations ia the Code of Federal Regulations at 21 CFR 73 and 74. 

Code of Federal Regulations Tide 10, Energy, Part 20, Standards for Protection Against Radiation, Washington, D.C., rev. May 21, 1991. 

Code of Federal Regulations, Tide 10, Part 52, "Eady Site Permits, Standard Design Certifications, and Combined Licenses for Nuclear Power Plants," Washington, D.C. 

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