Skip to Content
MilliporeSigma
  • The identification and assay of 2-methyl-5-nitroimidazole in pigs treated with dimetridazole.

The identification and assay of 2-methyl-5-nitroimidazole in pigs treated with dimetridazole.

Food additives and contaminants (1991-07-01)
G Carignan, K Carrier, S Sved
ABSTRACT

An unidentified metabolite of dimetridazole (DMZ), found in pig plasma, muscle and kidney, was shown by chromatography and spectroscopy to be 2-methyl-5-nitroimidazole (2-MNI), resulting from N-demethylation of DMZ. This route of degradation competes with the oxidation pathway previously described. The concentration of 2-MNI in the plasma of pig fed medicated diet (DMZ 0.0125%) ranged from 29 to 83 ppb, 2 hours after the morning meal, similar to DMZ, but lower than that of the major metabolite, 2-hydroxymethyl-1-methyl-5-nitroimidazole (HMMNI). Its elimination profile in plasma was biphasic, similar to those of HMMNI and DMZ. Early and terminal half lives were 2.6 and 9.1 h respectively. None of the metabolites could be detected in any of the tissues studied 49 hours after withdrawal.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
2-Methyl-4(5)-nitroimidazole, 99%
Supelco
Tinidazole Related Compound A, Pharmaceutical Secondary Standard; Certified Reference Material
Metronidazole impurity A, European Pharmacopoeia (EP) Reference Standard
Supelco
Menidazole, VETRANAL®, analytical standard