||Determination of rates of reaction in the gas-phase in the troposphere : theory and practice. 4. Rate of indirect photoreaction /
||Environmental Protection Agency, Washington, DC. Office of Toxic Substances.
|| U.S. Environmental Protection Agency, Office of Toxic Substances,
Tropospheric chemistry--Mathematical models. ;
Hydroxyl group--Environmental effects. ;
Reaction kinetics ;
Atmospheric chemistry ;
Photochemical reactions ;
Air pollution ;
Hydroxyl radicals ;
Molecular structure ;
Chemical reactivity ;
Organic compounds ;
Mathematical models ;
Structure reactivity relationships ;
Toxic Substances Control Act
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||79 pages ; 28 cm
||The document describes a test guideline (section 796.3900) which can be used under sections 4 and 5 of the Toxic Substances Control Act (TSCA) to regulate industrial chemicals. It describes structure/reactivity (S/R) relationships of Atkinson of the University of California/Riverside for estimating the second-order rate constant k(OH) and the associated half-life t(sub 1/2)E for the reaction of an organic chemical with hydroxyl radicals in the gas-phase in the troposphere. All pertinent parameters and equations are listed in the report to enable a scientist to calculate k(OH) and t(sub 1/2)E. Sixteen organic chemicals, covering a range of molecular structures, are used to illustrate the use of the S/R relationships of Atkinson to estimate k(OH). A hypothetical example is given to illustrate the use of these S/R relationships to define testing under section 4 of TSCA. A mathematical synopsis of the S/R relationships of Atkinson is given in Section IV of the report.
||"EPA 700-R-92-003." Includes bibliographical references. "4. Rate of indirect photoreaction: screening test level guideline section 796.3900. Estimation of the estimation of the second-order rate constant for the reaction of organic chemicals in the troposphere." Microfiche.
||Washington, DC :
||See also PB92-150374.
|Corporate Au Added Ent
||United States. Environmental Protection Agency. Office of Pollution Prevention and Toxics.
|PUB Date Free Form
||PC A05/MF A01
|OCLC Time Stamp
|OCLC Rec Leader
||01407nam 2200289Ka 45020