Calcium hypochlorite is a chemical compound with the formula Ca(ClO)₂. It is a white or gray powder or granular solid with a strong chlorine odor. Calcium hypochlorite is commonly used as a swimming pool sanitizer and also as a disinfectant for drinking water and wastewater treatment. It is highly reactive and decomposes in water to produce chlorine gas and calcium hydroxide. The dispersal of the gas from a container, especially when mixed with other chemicals, can be dangerous, and it can cause irritation to the eyes, nose, and throat when inhaled. When handling calcium hypochlorite, it's essential to wear protective gear, such as gloves and goggles, to prevent skin and eye exposure.