Used as a surfactant in cleaning products such as laundry detergents and dishwashing liquids due to its strong ability to reduce surface tension and emulsify oils. Commonly applied in laboratory settings for testing anionic detergent levels in water samples to monitor environmental pollution. Also utilized in industrial processes for its wetting and foaming properties, especially in textile and pulp industries. Its standard solution form allows for precise calibration in analytical methods like titration and spectrophotometry.