Ecological Assessment of Storm Impacts

Data Collection

Acephate

Basic Information

Synonym(s): Ortho 12420; O,S-dimethyl acetylphosphoramidothioate; O,S-DIMETHYLACETYLPHOSPHOROAMIDOTHIOATE; Acephate; Acephate ; Acetamidophos; Acetylphosphoramidothioic acid O,S-dimethyl ester; Asataf; Dimethyl acetylphosphoramidothioate; Kitron; Orthene; Orthene-755
Formula: C₄H₁₀NO₃PS
Molecular Weight: 183.17
Melting Point (°C): 93
Contaminant Type: Acephate is an insecticide.
Notes: White solid

Solubility (in water)

• Solubility: 818000 mg/l ^p
  Temperature (°C): 25
  

• Solubility: 65 % ^g
  Temperature (°C): Room
  

• Solubility: 790000 mg/l ^ak
  Temperature (°C): 20
  

• Solubility: 650 g/l ^h
  Temperature (°C): 20
  

Half-Life (in soil unless otherwise noted)

• t1/2: 3-6 days ^b
  

• t1/2: <3 days ^g
  Environment: Aerobic conditions
  

• t1/2: 7 days ^g
  Environment: Anaerobic conditions
  

• t1/2: 7-10 days ^ak
  

• t1/2: <3 days ^h
  Environment: aerobic soil
  

• t1/2: 6 days ^h
  Environment: anaerobic soil
  

• t1/2: 1.5-13 days ^ap
  

Toxicity Effects

• Organism Type: Birds ^h
  Common Name: Chickens
  Toxicity: 852 mg/kg
  Test: 96h LC50
  

• Organism Type: Birds ^h
  Common Name: Mallard
  Scientific Name: Anas platyrhynchos
  Toxicity: 350 mg/kg
  Test: 96h LC50
  

• Organism Type: Birds ^g
  Common Name: Mallard
  Scientific Name: Anas platyrhynchos
  Toxicity: 350 mg/kg
  Test: LD50
  

• Organism Type: Birds ^g
  Common Name: pheasant
  Scientific Name: Phasianidae (Family)
  Toxicity: 140 mg/kg
  Test: LD50
  

• Organism Type: Birds ^h
  Common Name: ring-necked pheasant
  Scientific Name: Phasianus colchicus
  Toxicity: 140 mg/kg
  Test: 96h LC50
  

• Organism Type: Crustaceans ^b
  Common Name: Crustaceans
  Toxicity: 0.3-190 mg/l
  Test: 96h LC50
  

• Organism Type: Crustaceans ^ak
  Common Name: Mysid shrimp
  Scientific Name: Mysidopsis bahia
  Toxicity: 7.3 mg/l
  Test: 96h LC50
  

• Organism Type: Crustaceans ^ak
  Common Name: Pink shrimp
  Scientific Name: Panaeus duorarum
  Toxicity: 3.8 mg/l
  Test: 96h LC50
  

• Organism Type: Fish ^b
  Common Name: Fish
  Toxicity: 2162-4258 mg/l
  Test: 96h LC50
  

• Organism Type: Fish ^ak
  Common Name: Channel catfish
  Scientific Name: Ictalurus punctatus
  Toxicity: 2230 mg/l
  Test: 96h LC50
  

• Organism Type: Fish ^ak
  Common Name: Bluegill
  Scientific Name: Lepomis macrochirus
  Toxicity: 2050 mg/l
  Test: 96h LC50
  

• Organism Type: Fish ^c
  Common Name: Bluegill
  Scientific Name: Lepomis macrochirus
  Toxicity: >2000 µg/l
  Test: 96h LC50
  Formulation: Acephate Pro 75
  

• Organism Type: Fish ^g
  Common Name: Bluegill
  Scientific Name: Lepomis macrochirus
  Toxicity: >1000 mg/l
  Test: 96h LC50
  

• Organism Type: Fish ^ak
  Common Name: Inland silverside, tidewater silverside
  Scientific Name: Menidia beryllina
  Toxicity: 3 mg/l
  Test: 96h LC50
  

• Organism Type: Fish ^ak
  Common Name: Inland silverside, tidewater silverside
  Scientific Name: Menidia beryllina
  Toxicity: 0.9 mg/l
  Test: MATC Life Cycle
  

• Organism Type: Fish ^ak
  Common Name: Largemouth bass
  Scientific Name: Micropterus salmoides
  Toxicity: 1725 mg/l
  Test: 96h LC50
  

• Organism Type: Fish ^ak
  Common Name: Rainbow trout
  Scientific Name: Oncorhynchus mykiss
  Toxicity: >1000 mg/l
  Test: 96h LC50
  

• Organism Type: Fish ^c
  Common Name: Rainbow trout
  Scientific Name: Oncorhynchus mykiss
  Toxicity: >1000 µg/l
  Test: 96h LC50
  Formulation: Acephate Pro 75
  

• Organism Type: Fish ^g
  Common Name: Rainbow trout
  Scientific Name: Oncorhynchus mykiss
  Toxicity: >1000 mg/l
  Test: 96h LC50
  

• Organism Type: Mammals ^ak
  Common Name: Dog
  Scientific Name: Canis (Genus)
  Toxicity: >681 mg/kg bw
  Test: LD50
  

• Organism Type: Mammals ^h
  Common Name: Mouse
  Scientific Name: Muridae (Family)
  Toxicity: 361 mg/kg
  Test: 96h LC50
  

• Organism Type: Mammals ^ak
  Common Name: Mouse
  Scientific Name: Muridae (Family)
  Toxicity: 361 mg/kg bw
  Test: LD50
  

• Organism Type: Mammals ^h
  Common Name: Rat
  Scientific Name: Muridae (Family)
  Gender: Female
  Toxicity: 866 mg/kg
  Test: LD50
  

• Organism Type: Mammals ^ak
  Common Name: Rat
  Scientific Name: Muridae (Family)
  Toxicity: 866-945 mg/kg bw
  Test: LD50
  

• Organism Type: Mammals ^h
  Common Name: Rat
  Scientific Name: Muridae (Family)
  Gender: Male
  Toxicity: 945 mg/kg
  Test: LD50
  

• Organism Type: Mammals ^g
  Common Name: Rat
  Scientific Name: Muridae (Family)
  Gender: Female
  Toxicity: 1030 mg/kg
  Test: LD50
  

• Organism Type: Mammals ^c
  Common Name: Rat
  Scientific Name: Muridae (Family)
  Toxicity: >10000 mg/kg
  Test: LD50
  Formulation: Acephate Pro 75
  

• Organism Type: Mammals ^g
  Common Name: Rat
  Scientific Name: Muridae (Family)
  Gender: Male
  Toxicity: 1447 mg/kg
  Test: LD50
  

• Organism Type: Molluscs ^b
  Common Name: Molluscs
  Toxicity: 8-300 mg/l
  Test: 48h EC50
  

Soil Organic Carbon/Water Partition Coefficients

• Koc: 3.02 ^b
  

• Koc: 0.48 ^k
  Formulation: log
  

Octanol-Water Partition Coefficients

• Log Kow: -0.85 ^p
  

• Log Kow: -1.87 ^h
  Notes: Source did not specify type of partition coeffecient or if value was the log

• Log Kow: -1.87 ^k
  Formulation: calculated
  

Work Cited