What is a characteristic of calcium hydroxide?

Calcium hydroxide is indeed characterized as a solid, caustic white powder, which is often used in various applications including wastewater treatment. This characteristic emphasizes its physical state and properties as a strong base. In solid form, calcium hydroxide can effectively aid in processes such as neutralizing acidity in water, precipitating heavy metals, and enhancing the settling of suspended solids.

The emphasis on its caustic nature also points to the caution required when handling this compound, as it can cause irritation or burns when it comes into contact with skin or eyes. This information adds to the understanding of why calcium hydroxide is significant in environmental science and wastewater management. Recognizing it as a solid, and understanding its caustic properties, helps establish its proper usage and handling guidelines in industrial and environmental contexts.