Ecological Assessment of Storm Impacts

Data Collection

Hexazinone

Basic Information

Synonym(s): 3-Cyclohexyl-1-methyl-6-(dimethylamino)-s-triazine-2,4(1H,3H)-dione; 3-cyclohexyl-6-(dimethylamino)-1-methyl-1,3,5-Triazine-2,4(1H,3H)-dione; Cyclohexyl-6-(dimethylamino)-1-methyl-s-triazine-2,4(1H,3H)-dione; DPX 3674; DPX-A3674; Hexazinone; Hexazinone ;
Formula: C₁₂H₂₀N₄O₂
Molecular Weight: 252.36
Melting Point (°C): 115 - 117
Contaminant Type: Hexazinone is an herbicide.

Solubility (in water)

• Solubility: 330000 mg/l ^ak
  Temperature (°C): 25
  

Half-Life (in soil unless otherwise noted)

• t1/2: 4-15 days ^ak
  Environment: in plant
  

• t1/2: 11-180 days ^ak
  Environment: in soil
  

• t1/2: 1-6 months ^ak
  Environment: in silt loam soils
  

• t1/2: 4-6 weeks ^ak
  Environment: in a clay soil
  

• t1/2: <4 weeks ^ak
  Environment: in a loamy sand
  

• t1/2: 90 days ^h
  Environment: representative of range (30-180 days)
  

• t1/2: 1 months ^k
  Environment: sandy soil
  

• t1/2: 6 months ^k
  Environment: clay
  

• t1/2: 4 weeks ^k
  Environment: Delaware sandy loam
  

• t1/2: 24 weeks ^k
  Environment: Mississippi silt loam
  

Toxicity Effects

• Organism Type: Birds ^h
  Common Name: bobwhite quail
  Scientific Name: Colinus virginianus
  Toxicity: 2258 mg/kg
  Test: LD50
  

• Organism Type: Crustaceans ^ak
  Common Name: Daphnia
  Scientific Name: Daphnia magna
  Toxicity: 151 mg/l
  Test: 48h LC50
  

• Organism Type: Fish ^h
  Common Name: Bluegill
  Scientific Name: Lepomis macrochirus
  Toxicity: 370 mg/l
  Test: 96h LC50
  

• Organism Type: Fish ^h
  Common Name: Rainbow trout
  Scientific Name: Oncorhynchus mykiss
  Toxicity: 320 mg/l
  Test: 96h LC50
  

• Organism Type: Fish ^g
  Common Name: Rainbow trout
  Scientific Name: Oncorhynchus mykiss
  Toxicity: 320-420 mg/l
  Test: 96h LC50
  

• Organism Type: Fish ^ak
  Common Name: Chinook salmon or king salmon
  Scientific Name: Oncorhynchus tshawytscha
  Life Stage: Juvenile
  Toxicity: 270-420 mg/l
  Test: 96h LC50
  

• Organism Type: Fish ^g
  Common Name: Minnow
  Scientific Name: Phoxinus phoxinus
  Toxicity: 274 mg/l
  Test: 96h LC50
  

• Organism Type: Fish ^h
  Common Name: Fathead minnow
  Scientific Name: Pimephales promelas
  Toxicity: 274 mg/l
  Test: 96h LC50
  

• Organism Type: Mammals ^h
  Common Name: Guinea pig
  Gender: Male
  Toxicity: 860 mg/kg
  Test: LD50
  

• Organism Type: Mammals ^ak
  Common Name: Rat
  Scientific Name: Muridae (Family)
  Toxicity: 860-1690 mg/kg bw
  Test: LD50
  

• Organism Type: Mammals ^g
  Common Name: Rat
  Scientific Name: Muridae (Family)
  Toxicity: 1690 mg/kg
  Test: LD50
  

• Organism Type: Mammals ^k
  Common Name: Rat
  Scientific Name: Muridae (Family)
  Toxicity: 1700 mg/kg
  Test: LD50
  

Soil Organic Carbon/Water Partition Coefficients

• Koc: 25 ml/g ^k
  Formulation: Fallsington sandy loam
  pH Value: 5.6
  

• Koc: 173 ml/g ^k
  Formulation: Flanagan silt loam
  pH Value: 5
  

• Koc: 1.30-1.43 ^k
  Formulation: log
  

Octanol-Water Partition Coefficients

• Log Kow: -4.4 ^h
  Formulation: calculated
  Notes: Source did not specify type of partition coeffecient or if value was the log

• Log Kow: 1.05 ^k
  

Work Cited