Contribution of 3,4-Dichlorophenylhydroxylamine in Propanil-Induced Hemolytic Anemia
The methemoglobinemia and hemolytic anemia observed in experimental animals given aniline has been shown to be mediated by its N-oxidation metabolite, phenylhydroxylamine (Harrison, J.H. et al., 1987; Harrison, J.H. et al., 1986). The aniline derivative, propanil (3,4-dichloropropionanilide), is a widely used arylamide herbicide that has been shown to induce methemoglobinemia in experimental animals following conversion of the parent amide to one or more oxidized metabolites (Singleton, S > D. et al., 1973; Chow, A.Y.K. et al., 1975). Two methemoglobinemic metabolites of propanil have been identified, 3,4-dichlorophenylhydroxylamine (N-hydroxy-3,4-dichloroaniline) and 6-hydroxy-3,4-dichloroaniline (McMillan, D.C. et al., 1990). In view of the hemolytic activity of phenylhydroxylamine, we have examined the hemolytic potential of propanil and its metabolites in rats.
KeywordsCorn Chromate Amide Anemia Aniline
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