pH Buffers are standardized calibration solutions used to ensure accurate and reliable performance of pH meters and electrodes. Prepared with precise, stable compositions, they provide fixed pH values—commonly pH 4.01, 7.00, and 10.01—to allow proper calibration across acidic, neutral, and alkaline ranges. Packaged in sealed, contamination-resistant bottles, pH buffers are essential for laboratories, water-testing facilities, pharmaceuticals, and industrial quality-control processes.