Ecological Assessment of Storm Impacts

Data Collection

Methoxychlor

Basic Information

Synonym(s): Dianisyltrichloroethane; Dimethoxydiphenyltrichloroethane; Dimethoxy-ddt; Dimethoxy-dt; Chemform; Maralate; Marlate; Maxie; Methoxcide; Methoxo; Methoxy DDT; Metox
Formula: C₁₆H₁₅Cl₃O₂
Molecular Weight: 345.652
Boiling Point (°C): 346
Melting Point (°C): 78
Contaminant Type: Methoxychlor is an insecticide.
Notes: Colorless to tan solid with a slight, fruity odor

Solubility (in water)

• Solubility: 0.04 mg/l ^e
  Temperature (°C): 24
  Formulation: 99% purity

Half-Life (in soil unless otherwise noted)

• t1/2: 0.5-1 years ^f
  Notes: Scientific judgements based upon very slow biodegradation observed in an aerobic soil die-away test study

Toxicity Effects

• Organism Type: Crustaceans ^e
  Common Name: Dungeness crab
  Scientific Name: Cancer magister
  Life Stage: Zoea
  Toxicity: 0.42 µg/l
  Test: 96h LC50,S
  

• Organism Type: Crustaceans ^e
  Common Name: Dungeness crab
  Scientific Name: Cancer magister
  Life Stage: Adult
  Toxicity: 1.3 µg/l
  Test: 96h LC50,S
  

• Organism Type: Crustaceans ^ce
  Scientific Name: Ceriodaphnia dubia
  Toxicity: 14.1 µg/l
  Test: 48h LC50
  

• Organism Type: Crustaceans ^e
  Common Name: Sand shrimp, sevenspine bay shrimp
  Scientific Name: Crangon septemspinosa
  Toxicity: 4 µg/l
  Test: 96h LC50,S
  

• Organism Type: Crustaceans ^e
  Common Name: Daphnia
  Scientific Name: Daphnia pulex
  Toxicity: 0.78 µg/l
  Test: 48h LC50
  

• Organism Type: Crustaceans ^e
  Scientific Name: Gammarus fasciatus
  Toxicity: 1.9 µg/l
  Test: 96h LC50
  

• Organism Type: Crustaceans ^e
  Scientific Name: Gammarus lacustris
  Toxicity: 0.8 µg/l
  Test: 96h LC50
  

• Organism Type: Crustaceans ^e
  Scientific Name: Orconectes nais
  Toxicity: 0.5 µg/l
  Test: 96h LC50
  

• Organism Type: Crustaceans ^e
  Common Name: Long-armed hermit crab
  Scientific Name: Pagurus longicarpus
  Toxicity: 7 µg/l
  Test: 96h LC50
  

• Organism Type: Crustaceans ^e
  Common Name: Migrant prawn, oriental shrimp
  Scientific Name: Palaemon macrodactylus
  Toxicity: 6.7 µg/l
  Test: 96h LC50,F
  

• Organism Type: Crustaceans ^e
  Common Name: Migrant prawn, oriental shrimp
  Scientific Name: Palaemon macrodactylus
  Toxicity: 0.44 µg/l
  Test: 96h LC50,S
  

• Organism Type: Crustaceans ^e
  Common Name: Mississippi grass shrimp
  Scientific Name: Palaemonetes kadiakensis
  Toxicity: 1 µg/l
  Test: 96h LC50
  

• Organism Type: Crustaceans ^e
  Common Name: Common grass shrimp
  Scientific Name: Palaemonetes vulgaris
  Toxicity: 12 µg/l
  Test: 96h LC50,S
  

• Organism Type: Crustaceans ^e
  Scientific Name: Simocephalus serrulatus
  Toxicity: 5 µg/l
  Test: 48h LC50
  

• Organism Type: Fish ^e
  Common Name: American eel
  Scientific Name: Anguilla rostrata
  Toxicity: 12 µg/l
  Test: 96h LC50,S
  

• Organism Type: Fish ^e
  Common Name: Sheepshead minnow
  Scientific Name: Cyprinodon variegatus
  Toxicity: 49 µg/l
  Test: 96h LC50
  

• Organism Type: Fish ^e
  Common Name: Sheepshead minnow
  Scientific Name: Cyprinodon variegatus
  Toxicity: 49 µg/l
  Test: 96h LC50,FT
  

• Organism Type: Fish ^e
  Common Name: Sheepshead minnow
  Scientific Name: Cyprinodon variegatus
  Toxicity: 17 µg/l
  Test: MATC Life Cycle
  

• Organism Type: Fish ^e
  Common Name: Mummichog
  Scientific Name: Fundulus heteroclitus
  Toxicity: 35 µg/l
  Test: 96h LC50,S
  

• Organism Type: Fish ^e
  Common Name: Striped killifish
  Scientific Name: Fundulus majalis
  Toxicity: 30 µg/l
  Test: 96h LC50,S
  

• Organism Type: Fish ^e
  Common Name: Alaskan stickleback, three-spine stickleback
  Scientific Name: Gasterosteus aculeatus
  Toxicity: 69 µg/l
  Test: 96h LC50,S
  

• Organism Type: Fish ^e
  Common Name: Bluegill
  Scientific Name: Lepomis macrochirus
  Toxicity: 62 µg/l
  Test: 96h LC50
  

• Organism Type: Fish ^e
  Common Name: Bluegill
  Scientific Name: Lepomis macrochirus
  Toxicity: 0.062 mg/l
  Test: 96h LC50
  

• Organism Type: Fish ^e
  Common Name: Atlantic silverside
  Scientific Name: Menidia menidia
  Toxicity: 33 µg/l
  Test: 96h LC50,S
  

• Organism Type: Fish ^e
  Common Name: Striped mullet
  Scientific Name: Mugil cephalus
  Toxicity: 63 µg/l
  Test: 96h LC50,S
  

• Organism Type: Fish ^e
  Common Name: Coho salmon or silver salmon
  Scientific Name: Oncorhynchus kisutch
  Toxicity: 66 µg/l
  Test: 96h LC50
  

• Organism Type: Fish ^e
  Common Name: Rainbow trout
  Scientific Name: Oncorhynchus mykiss
  Toxicity: 0.02 mg/l
  Test: 96h LC50
  

• Organism Type: Fish ^e
  Common Name: Chinook salmon or king salmon
  Scientific Name: Oncorhynchus tshawytscha
  Toxicity: 28 µg/l
  Test: 96h LC50
  

• Organism Type: Fish ^e
  Common Name: Yellow perch
  Scientific Name: Perca flavescens
  Toxicity: 20 µg/l
  Test: 96h LC50
  

• Organism Type: Fish ^e
  Common Name: Fathead minnow
  Scientific Name: Pimephales promelas
  Toxicity: 7.5 µg/l
  Test: 96h LC50
  

• Organism Type: Fish ^e
  Common Name: Columbia River redband trout
  Scientific Name: Salmo gairdneri
  Toxicity: 53 µg/l
  Test: 96h LC50
  

• Organism Type: Fish ^e
  Common Name: Atlantic salmon
  Scientific Name: Salmo salar
  Toxicity: 75-92 µg/l
  Test: 24h LC50,S
  

• Organism Type: Fish ^e
  Common Name: Northern puffer
  Scientific Name: Sphaeroides maculatus
  Toxicity: 150 µg/l
  Test: 96h LC50,S
  

• Organism Type: Fish ^e
  Common Name: Bluehead
  Scientific Name: Thalassoma bifasciatum
  Toxicity: 13 µg/l
  Test: 96h LC50,S
  

• Organism Type: Mammals ^g
  Common Name: Rat
  Scientific Name: Muridae (Family)
  Toxicity: 6000 mg/kg
  Test: LD50
  

Soil Organic Carbon/Water Partition Coefficients

• Koc: 9700 ^e
  Formulation: in clay
  

• Koc: 100000 ^e
  Formulation: in silt
  

Octanol-Water Partition Coefficients

• Log Kow: "4.3, 4.68" ^e
  

Work Cited