Used as a reference standard in analytical laboratories for the accurate determination of chromium(IV) concentrations in environmental, industrial, and water samples. Commonly applied in calibration of instruments such as atomic absorption spectrometers (AAS), inductively coupled plasma mass spectrometry (ICP-MS), and UV-Vis spectrophotometers. Essential for monitoring chromium levels in wastewater and industrial effluents to ensure compliance with environmental and safety regulations. Also utilized in research and quality control processes involving chromium chemistry.