Used in construction as a key component in cement and plaster, contributing to the hardening process. Plays a role in agriculture to improve soil structure and reduce acidity. Employed in water treatment to adjust pH and soften water by removing impurities. Common in food industry as a firming agent for canned vegetables and fruits. Utilized in pharmaceuticals as a calcium supplement and in antacids for acid neutralization. Also found in skincare products for its soothing and buffering properties.