Ecological Assessment of Storm Impacts

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Data Collection

Phenmedipham

CAS Number: 13684-63-4

Basic Information

The chemical structure of Phenmedipham Synonym(s): Betamix; Betanal; Carbanilic acid, m-hydroxy-, methyl ester, m-methylcarbanilate (ester); Carbanilic acid, m-methyl-, ester with methyl m-hydroxycarbanilate; EP-452; Fenmedifam; methyl 3-(m-tolylcarbamoyloxy)phenylcarbamate; methyl m-hydroxycarbanilate, m-methylcarbanilate
Formula: C16H16N2O4
 Molecular Weight: 300.32
 Melting Point (°C): 143 - 144
Contaminant Type: Phenmedipham is an herbicide.

Solubility (in water)

  • Solubility: 4.7-6.0 mg/l k
    Temperature (°C): 20

Half-Life (in soil unless otherwise noted)

  • t1/2: 20-26 days k

Toxicity Effects

  • Organism Type: Fish k
    Common Name: Bluegill
     Scientific Name: Lepomis macrochirus
     Toxicity: 3.98 mg/l
     Test: 96h LC50
  • Organism Type: Fish g
    Common Name: Harlequin fish
     Scientific Name: Rasbora heteromorpha
     Toxicity: 16.5 mg/l
     Test: 96h LC50

Soil Organic Carbon/Water Partition Coefficients

  • Koc: 3.21-3.27 k
    Formulation: log - calculated

Octanol-Water Partition Coefficients

  • Log Kow: 3.59 k
    Formulation: pH4

Work Cited

g Meister, R. T., and C. Sine (Ed). 2003. Crop Protection Handbook, volume 89. Meister Publishing Company, Willoughby, OH.
k Montgomery, J. H. 1993. Agrochemicals Desk Reference: Environmental Data. Lewis Publishers, Boca Raton, FL.