Isophorone regulations

Drinking water standard No MCLGs or MCLs have been proposed although isophorone has been listed for regulation (U.S. EPA, 1996). A DWEL of 700 pg/L was recommended (U.S. EPA, 2000). 

International guidelines for isophorone were not located. National and state regulations and guidelines pertinent to human exposure to isophorone are summarized in Table 7-1. 

EPA. 1980b. Ambient Water Quality Criteria for Isophorone. Prepared by the Office of Health and Environmental Assessment, Environmental Criteria and Assessment Office, Cincinnati, OH for the Office of Water Regulations and Standards, Washington, DC. EPA 440/5-80-056. NTIS PB 81-117673. 

Solvent use is controlled by both state and federal regulations. The federal Clean Air Act Amendments of 1990 mandate controls on solvent use in the industry. Almost all organic solvents are classified as VOCs under Title I of the 1990 Amendments and these regulations will require further reductions in future solvent use. Title III of the 1990 Amendments contains a long list of substances considered Hazardous Air Pollutants (HAPs). Some of the ketone solvents are on the HAP list. The solvents discussed in this chapter and that are on the HAP list include isophorone, methyl ethyl ketone, and methyl isobutyl ketone. The Maximum Achievable Control Technology (MACT) standards in the Title III section will become active during the late 1990s and... 

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