Ecological Assessment of Storm Impacts

Data Collection

Imidacloprid

Basic Information

Synonym(s): 1-((6-Chloro-3-pyridinyl)methyl)-N-nitro-imidazolidinimine; ((6-Chloro-3-pyridinyl)methyl)-N-nitro-2-imidazolidinimine; Imidacloprid
Formula: C₉H₁₀ClN₅O₂
Molecular Weight: 255.663
Contaminant Type: Imidacloprid is an insecticide.
Additional Information: Imidacloprid is moderately soluble and has moderate binding affinity to organic materials in soils. However, there is a potential for the compound to move through sensitive soil types including porous, gravelly, or cobbly soils, depending on irrigation practices. ^h

Solubility (in water)

• Solubility: 9 - 10 % ^c
  Formulation: Merit 75 WP

• Solubility: 0.51 g/l ^h
  Temperature (°C): 20
  

• Solubility: 514 mg/l ^w
  Temperature (°C): 20
  pH Value: 7
  

Half-Life (in soil unless otherwise noted)

• t1/2: 38.9 days ^w
  Environment: Soil photolysis
  

• t1/2: 27-229 days ^w
  Environment: Depending upon soil type
  

• t1/2: 48 days ^w
  Environment: under vegetation
  

• t1/2: 190 days ^w
  Environment: Without vegetation
  

• t1/2: 229 days ^w
  Environment: without light in field studies
  

• t1/2: 997 days ^w
  Environment: Without light in lab studies
  

• t1/2: 40 days ^w
  Environment: When no organic fertilizers were used
  

• t1/2: 124 days ^w
  Environment: When cow manure was used
  

Toxicity Effects

• Organism Type: Crustaceans ^w
  Common Name: Daphnia
  Scientific Name: Daphnia magna
  Toxicity: 85 mg/l
  Test: 48h LC50
  

• Organism Type: Crustaceans ^w
  Common Name: Mysid shrimp
  Scientific Name: Mysidopsis bahia
  Toxicity: 34 µg/l
  Test: 96h LC50
  

• Organism Type: Fish ^m
  Common Name: Golden orfe
  Toxicity: 237 mg/l
  Test: 96h LC50
  

• Organism Type: Fish ^m
  Common Name: Carp
  Scientific Name: Cyprinus carpio
  Toxicity: 280 mg/l
  Test: 96h LC50
  

• Organism Type: Fish ^w
  Common Name: Rainbow trout
  Scientific Name: Oncorhynchus mykiss
  Toxicity: 211 mg/l
  Test: 96h LC50
  

• Organism Type: Fish ^w
  Common Name: Rainbow trout
  Scientific Name: Oncorhynchus mykiss
  Toxicity: >83 mg/l
  Test: 96h LC50
  

• Organism Type: Mammals ^c
  Common Name: Rat
  Scientific Name: Muridae (Family)
  Gender: Female
  Toxicity: 1858 mg/kg
  Test: LD50
  Formulation: Merit 75 WP
  

• Organism Type: Mammals ^c
  Common Name: Rat
  Scientific Name: Muridae (Family)
  Gender: Male
  Toxicity: 2591 mg/kg
  Test: LD50
  Formulation: Merit 75 WP
  

• Organism Type: Mammals ^w
  Common Name: Rat
  Scientific Name: Muridae (Family)
  Toxicity: 450 mg/kg
  Test: LD50
  

Soil Organic Carbon/Water Partition Coefficients

• Koc: 132 - 310 ^w
  

Octanol-Water Partition Coefficients

• Log Kow: 0.57 ^p
  

• Log Kow: 0.57 ^h
  Formulation: At 22 degrees Celcius
  

Work Cited