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This article in SSSAJ

  1. Vol. 41 No. 1, p. 141-142
    Received: July 2, 1976
    Accepted: Sept 23, 1976

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Chemical Detoxication of Atrazine by Dexon1

  1. C. B. Brown and
  2. S. F. Rahman2



The nonphytotoxic analogs of atrazine (2-chloro-4-ethylamino, 6 isopropylamino-s triazine) are hydroxyatrazine and protonated hydroxyatrazine. Distinctive infrared bands of these compounds appear at 1620, 1680, and 1740 cm-1, respectively. By monitoring these distinctive bands of the compounds, it has been demonstrated that in a combination of atrazine and dexon (p-[dimethylamino] benzenediazo sodium sulphonate) there is a time-dependent chemical change of some atrazine to protonated hydroxyatrazine indicating a reduction in phytotoxicity of the s-triazine. A part of dexon-atrazine antagonism—the reduction of atrazine toxicity to certain plants in the presence of dexon—is due to chemical reaction.

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