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Novel spectrophotometric methods were developed for the determination of fenpropathrin in insecticidal formulations and water samples. The methods were based on the hydrolysis of fenpropathrin with ethanolic KOH to form 3-phenoxy benzaldehyde. The resultant aldehyde group was condensed with anthranilic acid in presence of basic medium to form yellowish red color product having λmax of 485 nm or condensed with 2-chloro phenyl hydrazine to form pink color product having λmax of 557 nm. The color derivatives were correspondingly stable for 5 and 8 days. The Beer's law was obeyed over the range from 0.03-10.0 µg mL-1 and molar absorptivity 2.586×104 L mol-1 cm-1 for anthranilic acid and from 0.02-8.0 µg mL-1 and molar absorptivity 3.924×104 L mol-1 cm-1 for 2-chloro phenyl hydrazine were observed. The optimum reaction conditions and other analytical parameters were established. The proposed methods have been applied for the analysis of water samples.