MES Buffer [2-(N-morpholino)ethanesulfonic acid] at 1 M concentration provides robust buffering strength for maintaining acidic pH values around 5.0. It supports biochemical systems that require precise pH control in the 5.5–7.0 range. Owing to its zwitterionic nature and minimal UV absorbance, MES is widely used in protein purification, column chromatography, and enzymatic assays where a stable and non-reactive buffer environment enhances data consistency.