Environmental Profile
Ecotoxicology:
Algae: EC50 (72 h) for Selenastrum capricornutum 0.015 mg/l.Bees: LC50 (48 h, oral) >197µg/bee; LD50 (48 h, contact) >200µg/bee.Birds:Acute oral LD50 for bobwhite quail 91 mg/kg. Dietary LC50 (8 d) for bobwhite quail and mallard ducks >5620 mg/ kg diet.Daphnia: LC50 (48 h) 7.8 mg/l.Fish: LC50 (96 h) for bluegill sunfish >1.4, rainbow trout 0.17, fathead minnow 0.49 mg/l.Worms: EC50 (14 d) for earthworms 217.9 mg/ kg soil.
Environmental fate:
EHC 147 notes that propachlor is rapidly degraded by micro-organisms in soil and water, and concludes that propachlor does not bioconcentrate or biomagnify. High toxicity to some aquatic organisms suggests that direct contamination of wateAnimals:In mammals, following oral administration, excreted in the urine within 72 hours. Metabolised in the liver and possibly in the kidneys. Glutathione conjugation is the main metabolic step (J. E. Bakke et al., Science, 1980, et al., J. Agric. Food Chem., 1986, 34, 721-725). DT50 4 d (3 soil types). Persists in soil for 4-6 weeks. LPlant:Rapidly metabolised in plants to polar compounds and to the 2-hydroxy analogue; glutathione conjugation is involved (G. L. Lamouren et al., J. Agric. Food Chem., 1971, 19, 346-351). SOIL PARTICLE ADSORPTION: Rapidly degradable; a.i. disappears in 4-6 weeks in light soil HAZARDS: Fish: Toxic. Bee: Nontoxic WATER SOLUBILITY: 580 mg/l at 25° C