Used in agriculture to correct calcium deficiencies in soils, improving cell wall strength in plants and preventing issues like blossom end rot in tomatoes and peppers. Applied in water treatment to adjust pH and add essential minerals. Commonly used in hydroponic and fertigation systems to supply readily available calcium to crops. Also utilized in food processing as a firming agent for canned fruits and vegetables. In laboratory settings, serves as a standard solution for titrations and calibration.