Ecological Assessment of Storm Impacts

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benzo(a)pyrene

CAS Number: 50-32-8

Basic Information

The chemical structure of benzo(a)pyrene Synonym(s): 3,4-benz[a]pyrene; 3,4-Benzopyrene; 3,4-Benzpyrene; 3,4-benzylpyrene; 3,4-BP; 6,7-Benzopyrene; B[A]P; Benzo[a]pyrene; Benzo[a]pyrene ; Benzo[d,e,f]chrysene; Benzpyrene; BP;
Formula: C20H12
 Molecular Weight: 252.315
 Boiling Point (°C): 495
 Melting Point (°C): 176.5
 Contaminant Type: benzo(a)pyrene is a polyclyclic aromatic hydrocarbon.
Notes: PALE YELLOW MONOCLINIC NEEDLES FROM BENZENE & METHANOL; CRYSTALS MAY BE MONOCLINIC OR ORTHORHOMBIC; Yellowish plates (from benzene and ligroin)

Solubility (in water)

  • Solubility: 0.005-0.010 mg/l ak
    Temperature (°C): 22
     Formulation: in seawater
  • Solubility: 3.00E-03 mg/l ak
  • Solubility: 3.80E-03 mg/kg ao
    Temperature (°C): 25
  • Solubility: 4.00E-03 mg/kg ao
    Temperature (°C): 27
  • Solubility: 3.80E-07 g/100ml d

Half-Life (in soil unless otherwise noted)

  • t1/2: 16 months ak
    Temperature (°C): 20
     Environment: abiotic degradation in sandy loam in the dark at 700 mg/kg
  • t1/2: "30, 37, 50, 54, 147, 175, 264, 294, 406, 420, 694" days ak
    Environment: degradation in a soil system at initial conc between 0.048 and 32 mg/kg soil
  • t1/2: 0.16-1.45 years f
    Temperature (°C): 10-30
     Environment: Based upon aerobic soil die-away test data
  • t1/2: 4 years ak
    Temperature (°C): 20
     Environment: biodegradation in sandy loam in the dark at 700 mg/kg

Toxicity Effects

  • Organism Type: Crustaceans ak
    Common Name: Daphnia
     Scientific Name: Daphnia pulex
     Toxicity: 0.005 mg/l
     Test: 96h LC50
  • Organism Type: Fish ak
    Scientific Name: Poeciliopsis lucida
     Toxicity: 1.2-3.7 mg/l
     Test: 24h LC50
  • Organism Type: Fish ak
    Scientific Name: Poeciliopsis lucida
     Toxicity: 1.2-3.7 mg/l
     Test: 24h LC50
  • Organism Type: Fish ak
    Scientific Name: Poeciliopsis lucida
     Toxicity: 1.2-3.7 mg/l
     Test: 24h LC50
  • Organism Type: Fish ak
    Scientific Name: Poeciliopsis lucida
     Toxicity: 1.2-3.7 mg/l
     Test: 24h LC50
  • Organism Type: Fish ak
    Scientific Name: Poeciliopsis lucida
     Toxicity: 1.2-3.7 mg/l
     Test: 24h LC50
  • Organism Type: Fish ak
    Scientific Name: Poeciliopsis lucida
     Toxicity: 1.2-3.7 mg/l
     Test: 24h LC50

Soil Organic Carbon/Water Partition Coefficients

  • Koc: Log Koc: 5.74 ay

Octanol-Water Partition Coefficients

  • Log Kow: 6.04 aj
  • Log Kow: 6.06 ay
  • Log Kow: 6.04 ak

Work Cited

d ChemFinder. Cambridge MA: CambridgeSoft Corporation. Retrieved November, 2003 from http://chemfinder.cambridgesoft.com
f Howard, P. H., R. S. Boethling, W. F. Jarvis, W. M. Meylan, and E. M. Michalenko. 1991. Handbook of Environmental Degradation Rates. Lewis Publishers., Chelsea, MI.
aj RAIS. 2005. Risk Assessment Information System. Pages retrieved April, 2005 from http://risk.lsd.ornl.gov/tox/rap_toxp.shtml. U.S. Department of Energy, Office of Environmental Management, Oak Ridge Operations (ORO) Office, Bechtel Jacobs Company LLC, Oak Ridge, TN.
ak Verschueren, K. 2001. Handbook of Environmental Data on Organic Chemicals, 4th edition. John Wiley & Sons, Inc., New York.
ao Santodonato, J., P. Howard, D. Basu, S.D. Lee, Si Duk, and L. Grant. 1981. Health and ecological assessment of polynuclear aromatic hydrocarbons. Pages 1-364 in Journal of environmental pathology and toxicology, volume 5(1). Park Forest South, Ill. : Pathotox Publishers.
ay Nagpal, N. K. 1993. Ambient Water Quality Criteria For Polycyclic Aromatic Hydrocarbons (PAHs). Pages retrieved April 2005 from http://www.env.gov.bc.ca/wat/wq/BCguidelines/pahs/index.html. British Columbia Ministry of Environment.