Phosphate-Buffered Saline (PBS - 7.4) is a balanced salt solution and common buffer that is widely used in cell culture, molecular biology and biochemistry applications as it can maintain physiological pH and osmolality. It is frequently employed for dilution and washing during a variety of biological applications. Available in 1X and 10X concentrations and 500 mL or 1000 mL volumes, PBS 7.4 ensures consistency and reliability for laboratory applications.