Phosphate buffer solution (pH 11.0) is designed to maintain a stable alkaline pH in chemical and industrial applications. It is commonly used in pharmaceutical formulations where high pH is required for drug stability or solubility. Suitable for cleaning and rinsing in laboratory settings, such as equipment sterilization and tissue preparation in histology under alkaline conditions. Employed in certain analytical techniques, including chromatography and electrophoresis requiring alkaline buffers, and for calibration of pH meters in the high pH range. Also utilized in water treatment and as a component in detergents or cleaners due to its buffering capacity at pH 11.0.