Ecological Assessment of Storm Impacts

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Data Collection

DCPA

CAS Number: 1861-32-1

Basic Information

The chemical structure of DCPA Synonym(s): 2,3,5,6-tetrachloro-1,4-Benzenedicarboxylic acid dimethyl ester; dimethyl 2,3,5,6-tetrachloro-1,4-benzenedicarboxylate; Dimethyl 2,3,5,6-Tetrachloroterephthalate; Dimethyl tetrachloroterephthalate; Chlorthal-dimethyl; Chlorthal-methyl; DAC 893; Dachtal; D
Formula: C10H6Cl4O4
 Molecular Weight: 331.967
 Melting Point (°C): 155 - 156
 Contaminant Type: DCPA is an herbicide.

Solubility (in water)

  • Solubility: 0.05 g/100ml d
  • Solubility: 5 mg/l h
    Temperature (°C): 25
  • Solubility: 5 mg/l ak
    Temperature (°C): 25

Half-Life (in soil unless otherwise noted)

  • t1/2: 14-100 days h
    Environment: moisture is essential for degradation
  • t1/2: 45 days ak
    Environment: in sandy soil
     Formulation: calculated
  • t1/2: ~100 days al
    Environment: most soils
  • t1/2: 3 months k
  • t1/2: 18-92 days f
    Environment: scientific judgement based upon unacclimated soil grab sample data

Toxicity Effects

  • Organism Type: Fish ak
    Common Name: Bluegill
     Scientific Name: Lepomis macrochirus
     Toxicity: 700 mg/l
     Test: 48h LC50
  • Organism Type: Mammals h
    Common Name: Dog
     Scientific Name: Canis (Genus)
     Toxicity: >10000 mg/kg
     Test: LD50
     Notes: beagle
  • Organism Type: Mammals g
    Common Name: Rat
     Scientific Name: Muridae (Family)
     Toxicity: >10000 mg/kg
     Test: LD50
  • Organism Type: Mammals ak
    Common Name: Rat
     Scientific Name: Muridae (Family)
     Toxicity: >3000 mg/kg bw
     Test: LD50
  • Organism Type: Mammals h
    Common Name: Rat
     Scientific Name: Muridae (Family)
     Toxicity: 3000-12500 mg/kg
     Test: LD50
  • Organism Type: Mammals h
    Common Name: Rat
     Scientific Name: Muridae (Family)
     Toxicity: 5500 mg/kg
     Test: LD50
  • Organism Type: Mammals ah
    Common Name: Rat
     Scientific Name: Muridae (Family)
     Toxicity: >10000 mg/kg
     Test: LD50

Soil Organic Carbon/Water Partition Coefficients

  • Koc: 3.81 k
    Formulation: log - calculated

Octanol-Water Partition Coefficients

  • Log Kow: 4.87 k
    Formulation: calculated

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.
g Meister, R. T., and C. Sine (Ed). 2003. Crop Protection Handbook, volume 89. Meister Publishing Company, Willoughby, OH.
h Extension Toxicology Network. Pages retrieved November, 2003 from http://ace.orst.edu/info/extoxnet/. Oregon State University, Corvallis, OR.
k Montgomery, J. H. 1993. Agrochemicals Desk Reference: Environmental Data. Lewis Publishers, Boca Raton, FL.
ah Meisterpro.com. Pages retrieved March, 2004 from www.meisterpro.com. MeisterPRO Information Services - a division of Meister Media Worldwide, Willoughby, OH.
ak Verschueren, K. 2001. Handbook of Environmental Data on Organic Chemicals, 4th edition. John Wiley & Sons, Inc., New York.
al Speclab.com. 2003. Spectrum chemcial fact sheet. Pages retrieved April 2005 from http://www.speclab.com/compound/. Spectrum Laboratory Inc, Ft. Lauderdale, FL and Savannah, GA.