Provided herein is a mouthwash formulation comprising a salt of an Nα-acyl-L-arginine alkyl ester and a peroxide source. The mouthwash formulation provides anti-microbial activity and whitening activity.本發明提供一種漱口水調配物,包含一Nα-醯基-L-精胺酸烷基酯的鹽與一過氧化物源。該漱口水調配物提供抗微生物活性及美白活性。