A trihydrate is a type of chemical compound that contains three molecules of water for each molecule of the substance. This water is not just present as moisture; it is chemically bonded to the compound, which can affect the compound's properties, such as its stability and solubility. Trihydrates are often found in various salts and minerals. In the context of chemistry, trihydrates are commonly represented in their chemical formulas, where the water molecules are indicated. For example, copper(II) sulfate pentahydrate is a well-known trihydrate that plays a significant role in various industrial applications and laboratory settings.