Parathion

CAS RN:56-38-2

Ecotoxicity Values

Ld50 dendrocygna bicolor (fulvous whistling-duck) oral 0.125-0.250 mg/kg /sample purity, 98.76%/
Ld50 mallard oral 2.13 mg/kg (95% confidence limit 1.54-2.96 mg/kg), 3-4 mo old males /98.76% technical grade/
Ld50 anas platyrhynchos (mallard) oral 1.90 mg/kg (95% confidence limit 1.37-2.64 mg/kg), 2-3 mo old females /sample purity, 98.76%/
Ld50 phasianus colchicus (pheasant) oral 12.4 mg/kg, 2-3 mo old males /sample purity, 98.76%
Ld50 alectoris chukar (chukar partridge) oral 24.0 mg/kg (95% confidence limit 16.8-34.2 mg/kg), 3-12 mo old males & females /sample purity, 98.76%/
Ld50 perdix perdix (gray partridge) oral 16.0 mg/kg (95% confidence limit 4.0-64.0 mg/kg), 3-10 mo old females /sample purity, 98.76%
Ld50 passer domesticus (house sparrow) oral 3.36 mg/kg (95% confidence limit 2.43-4.66 mg/kg), females /sample purity, 98.86%
Ld50 tympanuchus phasianellus (sharp-tailed grouse) oral 5.66 mg/kg (95% confidence limit, 3.46-9.24 mg/kg) 12-36 mo old females /sample purity, 98.6% & 99.5%
Ld50 odocoileus hemionus hemiomus (mule deer) oral 22.0-44.0 mg/kg, 10 mo old males /sample purity, 99.5%
Ec50 simocephalus (daphnids) 0.47 ug/l/48 hr @ 21 deg C (95% confidence limit 0.34-0.66 ug/l), first instar, static bioassay without aeration /technical material, 98.7%/
Ec50 daphnia pulex (daphnids) 0.60 ug/l/48 hr @ 15 deg C (95% confidence limit 0.45-0.79 ug/l), first instar, static bioassay without aeration /technical material, 98.7%/
Lc50 asellus brevicaudus (sowbugs) 2,130 ug/l/96 hr @ 15 deg C (95% confidence limit 1,450-3,120 ug/l), mature, static bioassay without aeration /technical material, 98.7%/
Lc50 gammarus lacustris (scuds) 3.4 ug/l/96 hr @ 21 deg C (95% confidence limit 2.6-4.8 ug/l), mature, static bioassay without aeration /technical material, 98.7%/
Lc50 gammarus fasciatus (scuds) 1.3 ug/l/96 hr @ 21 deg C (95% confidence limit 0.60-1.9 ug/l), mature, static bioassay without aeration /technical material, 98.7%/
Lc50 orconectes nais (crayfish) 0.04 ug/l/96 hr @ 21 deg C (95% confidence limit 0.01-0.20 ug/l), early instar, static bioassay without aeration /technical material, 98.7%/
Lc50 palaemonetes kadiakensis (glass shrimp) 1.5 ug/l/96 hr @ 21 deg C (95% confidence limit 0.82-2.7 ug/l), mature, static bioassay without aeration /technical material, 98.7%/
Lc50 procambarus (crayfish) less than 250 ug/l/96 hr @ 12 deg C, mature, static bioassay without aeration /technical material, 98.7%/
Lc50 pteronarcys californica (stoneflies) 5.4 ug/l/96 hr @ 15 deg C (95% confidence limit 4.7-6.2 ug/l), naiad, static bioassay without aeration /technical material, 98.7%/
Lc50 claassenia sabulosa (stoneflies) 1.5 ug/l/96 hr @ 15 deg C (95% confidence limit 1.0-2.2 ug/l), second yr class, static bioassay without aeration /technical material, 98.7%/
Lc50 hexagenia bilineata (mayflies) 15 ug/l/96 hr @ 24 deg C, juvenile, static bioassay without aeration /technical material, 98.7%/
Lc50 ischnura venticalis (damselfly) 0.64 ug/l/96 hr @ 24 deg C, juvenile, static bioassay without aeration /technical material, 98.7%/
Lc50 salmo clarki (cutthroat trout) 1,560 ug/l/48 hr @ 12 deg C (95% confidence limit 985-2,470 ug/l), wt 0.3 g, static bioassay without aeration /technical material, 98.7%/
Lc50 salmo gairdneri (rainbow trout) 1,430 ug/l/96 hr @ 12 deg C (95% confidence limit 962-2110 ug/l), wt 1.0 g, static bioassay without aeration /technical material, 98.7%/
Lc50 salvelinus namaycush (lake trout) 1920 ug/l/96 hr @ 12 deg C (95% confidence limit 1,750-2,100 ug/l), wt 0.7 g, static bioassay without aeration /technical material, 98.7%/
Lc50 carassius auratus (goldfish) 1,830 ug/l/96 hr @ 18 deg C (95% confidence limit 1,350-2,470 ug/l), wt 0.9 g, static bioassay without aeration /technical material, 98.7%/
Lc50 pimephales promelas (fathead minnow) 2,350 ug/l/96 hr @ 18 deg C (95% confidence limit 1,760-3,120 ug/l), wt 0.8 g, static bioassay without aeration /technical material, 98.7%/
Lc50 ictalurus punctatus (channel catfish) 2,650 ug/l/96 hr @ 18 deg C (95% confidence limit 2,160-3,260 ug/l), wt 1.4 g, static bioassay without aeration /technical material, 98.7%/
Lc50 gambusia affinis (mosquitofish) 320 ug/l/96 hr @ 17 deg C (95% confidence limit 156-647 ug/l), wt 0.6 g, static bioassay without aeration /technical material, 98.7%/
Lc50 lepomis cyanellus (green sunfish) 930 ug/l/96 hr @ 18 deg C (95% confidence limit 675-1,282 ug/l), wt 1.1 g, static bioassay without aeration /technical material, 98.7%/
Lc50 lepomis macrochirus (bluegill) 400 ug/l/96 hr @ 18 deg C (95% confidence limit 295-543 ug/l), wt 1.0 g, static bioassay without aeration /technical material, 98.7%/
Lc50 micropterus salmoides (largemouth bass) 620 ug/l/96 hr @ 18 deg C (95% confidence limit 462-830 ug/l), wt 0.7 g, static bioassay without aeration /technical material, 98.7%/
Lc50 salmo gairdneri (rainbow trout) 750 ug/l/96 hr @ 12 deg C (95% confidence limit 520-1,100 ug/l), wt 1.5 g, static bioassay without aeration /thioate analog, 100% technical grade/
Lc50 ictalurus punctatus (channel catfish) 3,300 ug/l/96 hr @ 18 deg C (95% confidence limit 3,090-3,520 ug/l), wt 1.4 g, static bioassay without aeration /thioate analog, 100% technical grade/
Lc50 lepomis macrochirus (bluegill) 24 ug/l/96 hr @ 18 deg C (95% confidence limit 15-38 ug/l), wt 1.4 g, static bioassay without aeration /thioate analog, 100% technical grade/
Lc50 colinus virginianus (bobwhite) oral 194 ppm in 5 day diet (95% confidence limit 150-245 ppm), age 14 days
Lc50 coturnix coturnix 44 ppm in 5 day diet (95% confidence limit 36-53 ppm)
Lc50 pheasant oral (phasianus sp) 365 ppm in 5 day diet (95% confidence limit 316-420 ppm)
LD50 Earthworm percutaneous (soil) 34 ng/g
LD50 Japanese quail (Coturnix japonica) oral 238 ppm, at libidum in 5-day diet (95% confidence interval, 152-373 ppm) /Technical grade in corn oil, 95% active ingredient/
EC50 Immobilization Daphnia magna 0.8 ug/l/50 hr. /Conditions of bioassay not specified/
EC50 Immobilization Simocephalus serrulatus (daphnid) 0.37 ug/l/48 hr. /Conditions of bioassay not specified/
TLm Hydropsyche californica (larval caddisfly) 0.43 ug/l/96 hr. /Conditions of bioassay not specified/
LC50 Tanypos grodhausi (larvae midge) 0.5 ug/l/24 hr. /Static bioassay without aeration/
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