CropLife International has classified bispyribac sodium as belonging to the chemical group Pyrimidinyl(thio)benzoates.
Acetolactate synthase catalyses the first step in the biosynthesis of the branched-chain amino acids isoleucine and valine in plants, bacteria, and fungi, as well as leucine in humans (Gawarammana 2010).
WHO classifies bispyribac as a chemical unlikely to produce acute hazard based on animal toxicity (Acute oral LD50 for male and female rats is 4111 and 2635 mg/kg, respectively).
Studies on the active constituent showed that bispyribac sodium is very rapidly and completely absorbed by the oral route and is rapidly excreted unchanged . . .
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