Amended group numbers

US Congress amended the Federal Clean Air Act in 1990 to address a large number of air pollutants that are known to cause or may reasonably be anticipated to cause adverse effects to human health or adverse environmental effects. 188 specific pollutants and chemical groups were initially identified as hazardous air pollutants (HAPs), and the list has been modified over time. 

For various reasons, groups such as the American Association of Pharmaceutical Chemists, the National Association of Medicinal Products, and the National Association of Druggists had opposed the bill in its initial form and lobbied actively for a number of modifications resulting in submission of a final form in 1913. Following considerable debate between House and Senate committees over proposed amendments, the Harrison Narcotics Act was passed on December 14, 1914, and went into effect March 1, 1915. Enforcement was assigned to the Bureau of Internal Revenue within the Treasury Department. 

In the United States two classes of color additives are recognized colorants exempt from certification and colorants subject to certification. The former are obtained from vegetable, animal, or mineral sources or are synthetic forms of naturally occurring compounds. The latter group of synthetic dyes and pigments is covered by the Color Additives Amendment of the U.S. Food, Drug and Cosmetic Act. In the United States these color compounds are not known by their common names but as FD C colors (Food, Drug and Cosmetic colors) with a color and a number (Noonan 1968). As an example,... 

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