Ecological Assessment of Storm Impacts

Data Collection

N-(2-Methylcyclohexyl)-N'-Phenylurea (Siduron)

Basic Information

Synonym(s): 1-(2-Methylcyclohexyl)-3-phenylurea; N-(2-methylcyclohexyl)-N'-phenylurea; Siduron; TREY; Tupersan
Formula: C₁₄H₂₀N₂O
Molecular Weight: 232.3
Melting Point (°C): 133 - 141
Contaminant Type: N-(2-Methylcyclohexyl)-N'-Phenylurea (Siduron) is an herbicide.

Solubility (in water)

• Solubility: 18 mg/l ^ak
  Temperature (°C): 25
  

• Solubility: 13 ppm ^g
  Temperature (°C): 25
  

Toxicity Effects

• Organism Type: Fish ^ak
  Common Name: Japanese goldfish
  Scientific Name: Carassius auratus
  Toxicity: 10 - 40 mg/l
  Test: 48h LC50
  

• Organism Type: Fish ^ak
  Common Name: Carp
  Scientific Name: Cyprinus carpio
  Toxicity: 18 mg/l
  Test: 48h LC50
  

• Organism Type: Fish ^ak
  Common Name: Columbia River redband trout
  Scientific Name: Salmo gairdneri
  Toxicity: 51 mg/l
  Test: 48h LC50
  

• Organism Type: Mammals ^g
  Common Name: Rat
  Scientific Name: Muridae (Family)
  Toxicity: >7500 mg/kg
  Test: LD50
  

• Organism Type: Mammals ^k
  Common Name: Rat
  Scientific Name: Muridae (Family)
  Toxicity: 5000 mg/kg
  Test: LD50
  

Soil Organic Carbon/Water Partition Coefficients

• Koc: 2.88 ^k
  Formulation: log - estimated
  

Octanol-Water Partition Coefficients

• Log Kow: 3.05 ^ak
  

• Log Kow: 2.7 ^k
  

Work Cited