Research Article

An Ecofriendly and Stability-Indicating HPLC Method for Determination of Permethrin Isomers: Application to Pharmaceutical Analysis

Table 1

Summary of stress degradation studies of permethrin isomers.

Stress condition/
media/duration
Recovered trans-isomer (%)Recovered cis-isomer (%)Number of unknown impurities

Photolytic/H2O/
254 nm/1 h
98.6998.060
Acidic/1.0 N HCl/12 h68.0864.574
Neutral/H2O/80°C/12 h96.8097.541
Oxidative/3.0% H2O2/4 h88.0584.760
Basic/1.0 N NaOH/12 h0.000.003