Ecological Assessment of Storm Impacts

Overview > Data Collection

Data Collection

Fipronil

CAS Number: 120068-37-3

Basic Information

The chemical structure of Fipronil Synonym(s): MB 46030; Pyrazole-3-carbonitrile, 5-amino-1-(2,6-dichloro-4-(trifluoromethyl)phenyl)-4-((trifluoromethyl)sulfinyl)-; Regent
Formula: C12H4Cl2F6N4OS
 Molecular Weight: 437.146
 Melting Point (°C): 195.5 - 203
 Contaminant Type: Fipronil is an insecticide.
Notes: White powder at 25ºC
 Additional Information: The photodegradate of fipronil, MB46513, is about 10 times more acutely toxic to mammals than fipronil itself. a

Solubility (in water)

  • Solubility: 1.9 mg/l c
    Temperature (°C): 20
     Formulation: Regent 4SC Tech
  • Solubility: 0.0024 g/l q
    pH Value: 5
  • Solubility: 0.0022 g/l q
    pH Value: 9

Half-Life (in soil unless otherwise noted)

  • t1/2: 122-128 days a
    Environment: Oxygenated soil
  • t1/2: 0.7-1.7 months a
    Environment: On soil surfaces
  • t1/2: 3-7.3 months a
    Environment: Incorporated into the soil
  • t1/2: 116-130 days a
    Environment: Anaerobic water and sediment
  • t1/2: 28 days a
    Environment: In basic solutions
  • t1/2: 34 days a
    Environment: Exposed to sunlight in loamy soil

Toxicity Effects

  • Organism Type: Birds c
    Common Name: Mallard
     Scientific Name: Anas platyrhynchos
     Toxicity: >5000 mg/kg
     Test: 8d LC50
     Formulation: Over'n Out
  • Organism Type: Birds c
    Common Name: bobwhite quail
     Scientific Name: Colinus virginianus
     Toxicity: >48 mg/kg
     Test: 8d LC50
     Formulation: Over'n Out
  • Organism Type: Crustaceans c
    Common Name: Daphnia
     Scientific Name: Daphnia magna
     Toxicity: 190 µg/l
     Test: 48h EC50
     Formulation: Regent 4SC
  • Organism Type: Crustaceans c
    Common Name: Daphnia
     Scientific Name: Daphnia magna
     Toxicity: 190 µg/l
     Test: 48h EC50,F
     Formulation: Over'n Out
  • Organism Type: Crustaceans u
    Common Name: Mysid shrimp
     Scientific Name: Mysidopsis bahia
     Toxicity: 0.14 µg/l
     Test: 24h EC50
  • Organism Type: Crustaceans u
    Common Name: Daggerblade grass shrimp
     Scientific Name: Palaemonetes pugio
     Life Stage: Adult
     Toxicity: 0.32 µg/l
     Test: 96h LC50
  • Organism Type: Crustaceans u
    Common Name: Daggerblade grass shrimp
     Scientific Name: Palaemonetes pugio
     Life Stage: Larval
     Toxicity: 0.68 µg/l
     Test: 96h LC50
  • Organism Type: Crustaceans u
    Common Name: Daggerblade grass shrimp
     Scientific Name: Palaemonetes pugio
     Life Stage: Embryo
     Toxicity: >512 µg/l
     Test: 96h LC50
  • Organism Type: Crustaceans u
    Common Name: Red-swamp crayfish
     Scientific Name: Procambarus clarkii
     Toxicity: 63.7 µg/l
     Test: 96h LC50
  • Organism Type: Crustaceans u
    Common Name: Crayfish
     Scientific Name: Procambarus zonangulus
     Toxicity: 65.1 µg/l
     Test: 96h LC50
  • Organism Type: Fish u
    Common Name: Sheepshead minnow
     Scientific Name: Cyprinodon variegatus
     Toxicity: 110-280 µg/l
     Test: 96h LC50
  • Organism Type: Fish c
    Common Name: Bluegill
     Scientific Name: Lepomis macrochirus
     Toxicity: 85 µg/l
     Test: 96h LC50
    Formulation: Regent 4SC
  • Organism Type: Fish c
    Common Name: Bluegill
     Scientific Name: Lepomis macrochirus
     Toxicity: 85 µg/l
     Test: 96h LC50
    Formulation: Over'n Out
  • Organism Type: Fish c
    Common Name: Rainbow trout
     Scientific Name: Oncorhynchus mykiss
    Toxicity: 248 µg/l
     Test: 96h LC50
    Formulation: Regent 4SC
  • Organism Type: Fish c
    Common Name: Rainbow trout
     Scientific Name: Oncorhynchus mykiss
    Toxicity: 248 µg/l
     Test: 96h LC50
    Formulation: Over'n Out
  • Organism Type: Mammals c
    Common Name: Rat
     Scientific Name: Muridae (Family)
     Toxicity: 336 mg/kg
     Test: LD50
     Formulation: Regent 4SC
  • Organism Type: Mammals a
    Common Name: Rat
     Scientific Name: Muridae (Family)
     Toxicity: 97 mg/kg
     Test: LD50
  • Organism Type: Mammals c
    Common Name: Rat
     Scientific Name: Muridae (Family)
     Toxicity: >5000 mg/kg
     Test: LD50
     Formulation: Over'n Out
  • Organism Type: Molluscs u
    Common Name: Eastern oyster
     Scientific Name: Crassostrea virginica
     Toxicity: 180-1700 µg/l
     Test: EC50

Soil Organic Carbon/Water Partition Coefficients

  • Koc: 803 ai

Resource Map: Click below to open in a new window to view or print.
Potential applications of this contaminant in the St. Johns Water River Management District

Work Cited

a Beyond pesticides fact sheets. Pages retrieved November, 2003 from http://www.beyondpesticides.org. Beyond Pesticides, Washington, DC.
c C&P Press. 2002. EPR Professional Annual CD. Crop Protection Reference. Chemical and Pharmacuetical Press, Inc., New York, NY.
q Connelly, P. 2001. Environmental fate of fipronil. Pages available from http://www.cdpr.ca.gov/docs/empm/pubs/fatememo/fipronil.pdf. Environmental Monitoring Branch Department of Pesticide Regulation, California Environmental Protection Agency, Sacramento, CA.
u Key, P. B., K. W. Chung, A. D. Opatkiewicz, E. F. Wirth, and M. H. Fulton. 2003. Toxicity of the insecticides fipronil and endosulfan to selected life stages of the grass shrimp (Palaemonetes pugio). Bulletin of Environmental Contamination and Toxicology 70:533-540.
ai Boyd, A. M., B. Noller, P. White, D. Gilbert, D. Smith, M. Mortimer, P. Langford, J. Martinkovic, R. Sadler, M. Hodge, M. Moore, J. Murray, C. Cristaldi, M.P. Zalucki, I. Francis, M. Brown, R. Cruice, and D. Connell. 2002. Environmental effects of currently used termiticides under Australian conditions. Pages retrieved December, 2004 from http://www.build.qld.gov.au/research/BrDocs/termiticides/termiticides_report.pdf. National Research Centre for Environmental Toxicology, Queensland, Australia.