Ecological Assessment of Storm Impacts

Data Collection

Oxydemeton-methyl

Basic Information

Synonym(s): O,O-dimethyl S-(2-eththionylethyl)phosphorothioate; O,O-dimethyl S-(2-ethylsulfinyl)ethyl thiophosphate; O,O-dimethyl S-ethylsulfinylethyl phosphorothiolate; metaisosystox sulfoxide; metasystemox; Metasystox R; bay 21097; bayer 21097; dimethyl S-(2-eththi
Formula: C₆H₁₅O₄PS₂
Molecular Weight: 246.276
Contaminant Type: Oxydemeton-methyl is an insecticide.
Notes: Clear, amber liquid

Solubility (in water)

• Solubility: 1-5 g/100ml ^d
  Temperature (°C): 16
  

• Solubility: miscible ^k
  

Toxicity Effects

• Organism Type: Birds ^ah
  Common Name: Mallard
  Scientific Name: Anas platyrhynchos
  Toxicity: 2003 ppm
  Test: 96h LC50
  

• Organism Type: Birds ^ah
  Common Name: bobwhite quail
  Scientific Name: Colinus virginianus
  Toxicity: 361 ppm
  Test: 96h LC50
  

• Organism Type: Crustaceans ^ak
  Scientific Name: Gammarus fasciatus
  Toxicity: 1000 µg/l
  Test: 96h LC50
  

• Organism Type: Crustaceans ^ak
  Scientific Name: Gammarus lacustris
  Toxicity: 190 µg/l
  Test: 96h LC50
  

• Organism Type: Fish ^ak
  Common Name: Channel catfish
  Scientific Name: Ictalurus punctatus
  Toxicity: 18 mg/l
  Test: 96h LC50
  

• Organism Type: Fish ^ak
  Common Name: Bluegill
  Scientific Name: Lepomis macrochirus
  Toxicity: 10 mg/l
  Test: 24h LC50
  

• Organism Type: Fish ^ak
  Common Name: Bluegill
  Scientific Name: Lepomis macrochirus
  Toxicity: 14 mg/l
  Test: 96h LC50
  

• Organism Type: Fish ^ak
  Common Name: Largemouth bass
  Scientific Name: Micropterus salmoides
  Toxicity: 31 mg/l
  Test: 96h LC50
  

• Organism Type: Fish ^ak
  Common Name: Rainbow trout
  Scientific Name: Oncorhynchus mykiss
  Toxicity: 28 mg/l
  Test: 24h LC50
  

• Organism Type: Fish ^ak
  Common Name: Rainbow trout
  Scientific Name: Oncorhynchus mykiss
  Toxicity: 10 mg/l
  Test: 24h LC50
  

• Organism Type: Fish ^ah
  Common Name: Rainbow trout
  Scientific Name: Oncorhynchus mykiss
  Toxicity: 23 mg/l
  Test: 96h LC50
  

• Organism Type: Fish ^ak
  Common Name: Columbia River redband trout
  Scientific Name: Salmo gairdneri
  Toxicity: 4 mg/l
  Test: 96h LC50
  

• Organism Type: Mammals ^ah
  Common Name: Rat
  Scientific Name: Muridae (Family)
  Toxicity: 50 mg/kg
  Test: LD50
  

• Organism Type: Mammals ^k
  Common Name: Rat
  Scientific Name: Muridae (Family)
  Toxicity: 65-75 mg/kg
  Test: LD50
  

• Organism Type: Mammals ^k
  Common Name: Rat
  Scientific Name: Muridae (Family)
  Toxicity: 30 mg/kg
  Test: LD50
  

• Organism Type: Mammals ^ak
  Common Name: Rat
  Scientific Name: Muridae (Family)
  Toxicity: 15-75 mg/kg bw
  Test: LD50
  

Soil Organic Carbon/Water Partition Coefficients

• Koc: 5 ml/g ^k
  Formulation: sand
  pH Value: 6.9
  

• Koc: 31 ml/g ^k
  Formulation: sandy loam
  pH Value: 5.5
  

• Koc: 16 ml/g ^k
  Formulation: silty loam
  pH Value: 6.7
  

• Koc: 0.70-1.49 ^k
  Formulation: log
  

Octanol-Water Partition Coefficients

• Log Kow: -0.75 ^ak
  

• Log Kow: -1.97 ^k
  Formulation: calculated
  

Work Cited