Skip to main content

Table 1 LD50 values and RPFs for organophosphate pesticides

From: Safety levels for organophosphate pesticide residues on fruits, vegetables, and nuts

OP LD50 (mg/kg) RPF Reference
acephate 1000 0.0019 EPA, 2006c
azinphos-methyl 4.4 0.4318 EPA, 2006d
bensulide 1082 0.0018 EPA, 2006e
cadusafos 391 0.0049 Meister and Sine, 2012
carbophenothion 10 0.1900 TAH, 1994
carbophenothion-methyl 48 0.0396 USDA, 1966
chlorfenvinophos 9.8 0.1939 Ambrose 1970
chlorpyrifos 223 0.0085 EPA, 2006f
coumaphos 17 0.1118 EPA, 1996
crotoxyphos 52.8 0.0360 Worthing 1983
demeton 2.5 0.7600 Gaines, 1960
dialifos 5 0.3800 Pearce, 1978
diazinon 1160 0.0016 EPA, 2006g
dichlorvos 56 0.0339 EPA, 2006h
dicrotophos 8 0.2375 EPA, 2006i
dimethoate 414 0.0046 EPA, 2008
dioxathion 43 0.0442 Worthing 1983
disulfoton 1.9 1.0000 EPA, 2006j
EPN 7 0.2714 Lewis, 1996
ethion 208 0.0091 Tomlin, 1994
ethoprop 32.8 0.0579 EPA, 2006k
fenamiphos 3 0.6333 EPA, 2002
fenchlorphos 1250 0.0015 Matsumura 1985
fenitrothion 1720 0.0011 Tomlin 1994
fensulfothion 1.8 1.0556 ACGIH, 1991
fenthion 461 0.0041 EPA, 2001
fonofos 8 0.2375 Hartley and Kidd, 1987
isocarbophos 50 0.0380 Eto, 1974
isofenphos 28 0.0679 Lewis, 1996
malathion 5700 0.0003 EPA, 2009
methamidophos 13 0.1462 EPA, 2006l
methidathion 32 0.0594 O’Neil, 2006
mevinphos 2.2 0.8636 CDPR, 1994
monocrotophos 14 0.1357 FAO/UNEP, 1997
naled 85 0.0224 CDPR, 1999
omethoate 25 0.0760 JMPR, 1996
oxydemeton-methyl 48 0.0396 EPA, 2006m
parathion 2 0.9500 Lewis 1996
parathion-methyl 24 0.0792 Worthing and Walker, 1987
phorate 1.4 1.3571 EPA, 2006n
phosalone 90 0.0211 EPA, 1987
phosmet 113 0.0168 EPA, 2006o
phosphamidon 17.4 0.1092 Worthing and Walker, 1987
phoxim 1400 0.0014 IPCS, 2000
pirimiphos-methyl 2400 0.0008 EPA, 2006p
profenofos 400 0.0048 Lewis, 1996
propetamphos 96.4 0.0197 EPA, 2006a
prothiophos 1800 0.0011 Bayer, 2008
quinalphos 26 0.0731 USDA, 1966
sulprofos 176 0.0108 Tomlin, 2002
terbufos 1.5 1.2667 EPA, 2006q
tetrachlorvinphos 465 0.0041 EPA, 1995
triazophos 82 0.0232 JMPR, 2002
trichlorfon 136 0.0140 EPA, 1997