E Pesticide Organic Carbon Partition Coefficients and Henry's Law Constants

Section 259.APPENDIX E  Pesticide Organic Carbon Partition Coefficients and Henry's Law Constants Pesticide Name CAS No. a Organic Carbon Partition Coefficients K oc (L/kg) b Henry's Law Constant H' (unitless) c acetochlor 34256-82-1 952 d 9.14E-07 f acifluorfen sodium 62476-59-9 113 8.10E-13 alachlor 15972-60-8 124 1.32E-06 aldicarb 116-06-3 26 5.07E-09 aldrin 309-00-2 17500 1.65E-02 atrazine 1912-24-9 147 1.01E-07 bentazon sodium 50723-80-3 35 4.63E-14 bromacil 314-40-9 15 h 4.57E-09 bromoxynil(o) 1689-99-2 190 1.31E-03 butylate 2008-41-5 304 3.46E-03 carbofuran 1563-66-2 46 2.10E-08 chlordane 57-74-9 60000 3.86E-03 chlorimuron-ethyl 90982-32-4 91 h 7.48E-14 chlorpyrifos 2921-88-2 9930 3.02E-04 cyanazine 21725-46-2 218 1.34E-10 2,4-D 94-75-7 48 7.35E-11 4,4'-DDD 72-54-8 231000 3.64E-04 4,4'-DDE 72-55-9 883000 4.15E-03 4,4'-DDT 50-29-3 921000 h 3.65E-04 diazinon 333-41-5 1520 2.90E-05 dicamba 1918-00-9 13 1.79E-08 dieldrin 60-57-1 12000 2.65E-05 dimethoate 60-51-5 20 5.61E-10 dinoseb 88-85-7 30 g 2.44E-07 disulfoton 298-04-4 1345 6.68E-05 endosulfan 115-29-7 12400 1.19E-05 endothall 145-73-3 85 1.56E-14 i endrin 72-20-8 10000 5.99E-05 EPTC 759-94-4 223 6.56E-04 glyphosate 1071-83-6 2100 5.732-11 HCH-alpha 319-84-6 5440 d 3.53E-04 e heptachlor 76-44-8 24000 1.43E-01 heptachlor epoxide 1024-57-3 78600 d 2.05E-03 e lindane 58-89-9 1355 7.42E-05 linuron 330-55-2 496 2.56E-07 malathion 121-75-5 1200 4.64E-07 methoxychlor 72-43-5 76000 4.80E-04 i metolachlor 51218-45-2 70 9.91E-07 metribuzin 21087-64-9 52 1.48E-09 parathion, ethyl 56-38-2 7660 9.57E-06 parathion, methyl 298-00-0 6300 3.88E-07 pendimethalin 40487-42-1 12400 4.98E-04 permethrin 52645-53-1 39300 7.68E-05 phorate 298-02-2 1057 4.07E-04 simazine 122-34-9 140 3.96E-08 2,4,5-TP 93-72-1 5440 d 2.04E-06 e terbufos 13071-79-9 650 1.09E-03 toxaphene 8001-35-2 100000 2.97E-05 trifluralin 1582-09-8 7200 6.21E-03 Notes: a Chemical Abstract Service (CAS). b Selected values from U.S. Department of Agriculture, Agriculture Research Service, Pesticide Properties Database (PPD), Alternate Crops & Systems Laboratory, Beltsville, Maryland, http://wizard.arsusda.gov/acsl/ppdb3.html, unless otherwise noted. c H' = K H as atm-m 3 /mol {vapor pressure x molecular weight / solubility in water} x {R (gas constant) x T (temperature as degrees Kelvin)} = K H x 41 at 25° C. Values from the ARS Pesticide Properties Database (PPD), unless otherwise noted. d K oc = 10 ( (0.983 x log K ow ) + 0.00028 ) , log K ow linear relationship with K oc by Di Toro, 1985 (Technical Background Document, p. 140, incorporated by reference at Section 259.150), log K ow values from Syracuse Research Corporation, Physical Properties Database (PHYSPROP), http://esc.syrres.com/interkow/physprop.htm. e Estimated K H values using data from the SRC Physical Properties Database (PHYSPROP) then converted to H' as noted in c above. f K H values from the SRC Physical Properties Database (PHYSPROP) then converted to H' as noted in c above. g Low K oc based on anionic nature (high solubility, low vapor pressure and above pH 5). h Mean of values listed in ARS Pesticide Properties Database (PPD). i Estimated using vapor pressure from SRC Physical Properties Database (PHYSPROP).