Regulations last checked for updates: May 18, 2024

Title 40 - Protection of Environment last revised: May 16, 2024
All TitlesTitle 40Chapter IPart 63Subpart GAppendix - Table 37 to Subpart G of Part 63—Default Biorates for List 1 Compounds
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Appendix - Table 37 to Subpart G of Part 63—Default Biorates for List 1 Compounds
Compound name Biorate, K1
L/g MLVSS-hr
Acetonitrile0.100
Acetophenone0.538
Acrylonitrile0.750
Biphenyl5.643
Chlorobenzene10.000
Dichloroethyl ether0.246
Diethyl sulfate0.105
Dimethyl hydrazine(1,1)0.227
DIMethyl sulfate0.178
Dinitrophenol 2,40.620
Dinitrotoluene(2,4)0.784
Dioxane(1,4)0.393
Ethylene glycol dimethyl ether0.364
Ethylene glycol monomethyl ether acetate0.159
Ethylene glycol monobutyl ether acetate0.496
Hexachlorobenzene16.179
ISophorone0.598
Methanol0.200
Methyl methacrylate4.300
Nitrobenzene2.300
Toluidine (-0)0.859
Trichlorobenzene 1,2,44.393
Trichlorophenol 2,4,54.477
Triethylamine1.064
authority: 42 U.S.C. 7401
source: 57 FR 61992, Dec. 29, 1992, unless otherwise noted.
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