Ecological Assessment of Storm Impacts

Data Collection

MCPA

Basic Information

Synonym(s): (4-Chloro-2-methylphenoxy)acetic acid; (4-chloro-o-toloxy)acetic acid; (4-Chloro-o-tolyloxy)acetic acid; Agroxon; Anicon kombi; Anicon m; BH MCPA; Dicopur-M; Dikotex; Bordermaster; Cekherbex; Chiptox
Formula: C₉H₉ClO₃
Molecular Weight: 200.621
Contaminant Type: MCPA is an herbicide.

Solubility (in water)

• Solubility: 825 mg/l ^ah
  Temperature (°C): Room
  

• Solubility: 730 mg/l ^e
  Formulation: acid

• Solubility: 825 mg/l ^h
  Temperature (°C): 25
  Formulation: acid

Half-Life (in soil unless otherwise noted)

• t1/2: 14-30 days ^h
  Notes: It depends on soil moisture and soil organic matter. Decreased soil moisture and microbial activity, as well as increased soil organic matter, will prolong the field half-life for MCPA

• t1/2: 5-6 days ^h
  Environment: in slightly acidic to slightly alkaline soils
  

Toxicity Effects

• Organism Type: Birds ^ah
  Common Name: bobwhite quail
  Scientific Name: Colinus virginianus
  Toxicity: 377 mg/kg
  Test: LD50
  

• Organism Type: Fish ^e
  Common Name: Bluegill
  Scientific Name: Lepomis macrochirus
  Toxicity: 1.5 mg/l
  Test: 48h LC50
  

• Organism Type: Fish ^e
  Common Name: Bluegill
  Scientific Name: Lepomis macrochirus
  Toxicity: 100 mg/l
  Test: 48h LC50
  

• Organism Type: Fish ^ah
  Common Name: Rainbow trout
  Scientific Name: Oncorhynchus mykiss
  Toxicity: 117 mg/l
  Test: 96h LC50
  

• Organism Type: Fish ^h
  Common Name: Rainbow trout
  Scientific Name: Oncorhynchus mykiss
  Toxicity: 117-232 mg/l
  Test: 96h LC50
  

• Organism Type: Fish ^e
  Common Name: Brown trout
  Scientific Name: Salmo trutta
  Toxicity: 147 mg/l
  Test: 24h LC50,S
  

• Organism Type: Mammals ^ah
  Common Name: Mouse
  Scientific Name: Muridae (Family)
  Toxicity: 550 mg/kg
  Test: LD50
  

• Organism Type: Mammals ^h
  Common Name: Mouse
  Scientific Name: Muridae (Family)
  Toxicity: 550-800 mg/kg
  Test: LD50
  

• Organism Type: Mammals ^h
  Common Name: Rat
  Scientific Name: Muridae (Family)
  Toxicity: 700-1160 mg/kg
  Test: LD50
  

• Organism Type: Mammals ^ah
  Common Name: Rat
  Scientific Name: Muridae (Family)
  Toxicity: 900-1160 mg/kg
  Test: LD50
  

• Organism Type: Mammals ^ah
  Common Name: Rat
  Scientific Name: Muridae (Family)
  Toxicity: 1914 mg/kg
  Test: LD50
  Formulation: Pol-Chwastox Extra
  

• Organism Type: Molluscs ^e
  Common Name: Eastern oyster
  Scientific Name: Crassostrea virginica
  Life Stage: Larval
  Toxicity: 31 mg/l
  Test: 14d LC50,S
  

• Organism Type: Molluscs ^e
  Common Name: Eastern oyster
  Scientific Name: Crassostrea virginica
  Life Stage: Egg
  Toxicity: 15 mg/l
  Test: 48h LC50,S
  

Work Cited