Sodium tetraborate standard solution is used as a reference for calibrating analytical methods in boron determination, particularly in water, soil, and industrial product quality analysis. It supports techniques such as titrimetric methods and spectroscopic analyses (e.g., ICP-OES, colorimetry). Due to its high purity and stability, it is commonly applied in analytical chemistry labs for instrument calibration and quality control. Additionally, it is utilized in preparing borate buffer solutions to maintain consistent pH in experiments.