Ecological Assessment of Storm Impacts

Data Collection

Chlorpyrifos-Methyl

Basic Information

Synonym(s): O,O-dimethyl O-(3,5,6-trichloro-2-pyridinyl) phosphorothioate; O,O-Dimethyl-O-(3,5,6-trichloro-2-pyridyl)phosphorothioate; Dimethyl O-(3,5,6-trichloro-2-pyridyl) phosophorothioate; Chlormethylfos; Chlorpyrifos-methyl; Dowco 214; Dursban methyl; Methyl chl
Formula: C₇H₇Cl₃NO₃PS
Molecular Weight: 322.53
Melting Point (°C): 45.5 - 46.5
Contaminant Type: Chlorpyrifos-Methyl is an insecticide.

Solubility (in water)

• Solubility: 4 mg/l ^ak
  

Half-Life (in soil unless otherwise noted)

• t1/2: 1.5-33 days ^ak
  Environment: depending upon soil type and microbial activity
  

• t1/2: 7 days ^ak
  Temperature (°C): 23-26
  Environment: "In a greenhouse at constant light and initial conc. of 5-10 mg/kg soil, experiment time 50 days - in sandy soil"
  

• t1/2: 6 days ^ak
  Temperature (°C): 23-26
  Environment: "In a greenhouse at constant light and initial conc. of 5-10 mg/kg soil, experiment time 50 days - in organic-rich orchard soil"
  

• t1/2: 6 days ^ak
  Temperature (°C): 23-26
  Environment: "In a greenhouse at constant light and initial conc. of 5-10 mg/kg soil, experiment time 50 days - in agricultural soil"
  

• t1/2: 11 days ^ak
  Temperature (°C): 23-26
  Environment: "In a greenhouse at constant light and initial conc. of 5-10 mg/kg soil, experiment time 50 days - in soil from volcanic area"
  

• t1/2: 7 days ^ak
  Temperature (°C): 23-26
  Environment: "In a greenhouse at constant light and initial conc. of 5-10 mg/kg soil, experiment time 50 days - in field experiments (dissipation t1/2)"
  

Toxicity Effects

• Organism Type: Crustaceans ^ak
  Common Name: Crayfish
  Scientific Name: Procambarus zonangulus
  Toxicity: 0.0004 mg/l
  Test: 36h LC50
  

• Organism Type: Fish ^ak
  Common Name: Rainbow trout
  Scientific Name: Oncorhynchus mykiss
  Toxicity: 0.3 mg/l
  Test: 96h LC50
  

• Organism Type: Mammals ^ak
  Common Name: Guinea pig
  Toxicity: 1830-2250 mg/kg bw
  Test: LD50
  

• Organism Type: Mammals ^ak
  Common Name: Rabbits
  Scientific Name: Lagomorpha (order)
  Toxicity: 1830-2250 mg/kg bw
  Test: LD50
  

• Organism Type: Mammals ^ak
  Common Name: Rat
  Scientific Name: Muridae (Family)
  Toxicity: 1830-2250 mg/kg bw
  Test: LD50
  

• Organism Type: Mammals ^ak
  Common Name: Mouse
  Scientific Name: Muridae (Family)
  Toxicity: 1830-2250 mg/kg bw
  Test: LD50
  

Soil Organic Carbon/Water Partition Coefficients

• Koc: 3.9 ^ak
  Formulation: log
  

Octanol-Water Partition Coefficients

• Log Kow: 4.3 ^ak
  

Work Cited