Aldehydes, ketones, and other carbonyl compounds are often synthesized using a lot of oxidizing agents like potassium permanganate. However, these oxidants left behind residues that were harmful to the environment. Therefore, more research should be done to identify an appropriate oxidant with minimal adverse effects on the environment. For use in fine chemistry, the noble metal was said to catalyze alcohol oxidation . They have great selectivity and strong catalytic activity. However, they are pricey and need to be used or recycled carefully.