Additions to the Master Testing List - Individual Chemicals

Note: EPA no longer updates this information, but it may be useful as a reference or resource.

The following provides a brief overview of the specific chemicals that have been added to the MTL since 1992:

One-hundred and forty-one (141) chemicals from the international Organization for Economic Cooperation and Development (OECD) "Screening Information Data Set" (SIDS) voluntary testing program;
Eighty-three (83) chemicals designated by the TSCA Interagency Testing Committee (ITC) for skin absorption rate testing in its 31st, 32nd and 35th Reports to EPA; however, the designation for 3 of the subject chemicals was subsequently withdrawn by the ITC and the chemicals were removed from the MTL;
One (1) chemical (white phosphorus) designated by the ITC for ecological effects testing in its 34th Report to EPA; however, the TSCA Section 4 testing designation for white phosphorus was subsequently withdrawn by the ITC and the chemical was removed from the MTL. In 1996, white phosphorus was added back to the MTL because EPA is trying to obtain ecological effects testing needed by the Department of the Interior via a mechanism other than a formal TSCA Section 4 rule-making activity;
Twenty-three (23) chemicals from the EPA Office of Air and Radiation (OAR) Clean Air Act Amendments (CAAA) Section 112 "Hazardous Air Pollutants" (HAPs) category;
Thirteen (13) chemicals (10 organics and 3 metals) from the Agency for Toxic Substances and Disease Registry (ATSDR) Superfund Amendments and Reauthorization Act (SARA) Section 104 category;
One (1) chemical (alkyl C12-C13 glycidyl ether) from the "Glycidol and Its Derivatives" category of chemicals originally designated for health effects testing under TSCA Section 4 by the ITC in its 3rd Report to the EPA Administrator;
Four (4) high production volume, high exposure chemicals from the Toxic Release Inventory (TRI) Screening category;
Six (6) siloxanes from a comprehensive industry testing program established via a voluntary "Memorandum of Understanding" (MOU) between EPA and the Dow Corning Corporation;
Three (3) dibasic esters (DBEs) used as substitutes for methylene chloride in paint stripping products; the testing action on DBEs, which are among the chemicals in EPA's ongoing assessment of paint stripping products and their components, is being developed at the request of the U.S. Consumer Product Safety Commission (CPSC);
Three (3) dibasic esters (DBEs) used as substitutes for methylene chloride in paint stripping products; the testing action on DBEs, which are among the chemicals in EPA's ongoing assessment of paint stripping products and their components, is being developed at the request of the U.S. Consumer Product Safety Commission (CPSC);
Three (3) chemicals from EPA's Office of Air and Radiation (OAR) Oxygenated Fuel Additives (OFAs) category;
One (1) chemical (aniline) from an industry testing program being conducted on a voluntary basis;
One (1) chemical (branched 4-nonylphenol) as the result of a formal OPPT TSCA Existing Chemical Program Risk Management (RM-1) disposition;
Five (5) chlorofluorocarbon substitutes from EPA's TSCA New Chemicals Program (NCP) Chemical Categories;
Fifteen (15) acrylates/methacrylates from EPA's TSCA NCP Chemical Categories;
Two (2) fluorescent whitening agents from EPA's TSCA NCP Chemical Categories;
Two (2) vinyl esters from EPA's TSCA NCP Chemical Categories; and
Ten (10) peroxides from EPA's TSCA NCP Chemical Categories.

Additions to the Master Testing List - Individual Chemicals

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