Fe2O33H2O

Fe2O33H2O is a chemical formula that represents a hydrated form of iron(III) oxide. This compound is commonly known as ferric oxide trihydrate or simply hydrated ferric oxide. It is a reddish-brown solid that is insoluble in water. The presence of three water molecules in its structure indicates that it is a hydrated salt, meaning water molecules are incorporated into its crystal lattice.

This substance is often formed during the rusting process of iron, where iron reacts with oxygen and water. While often referred to as "rust," true rust is a more complex mixture of hydrated iron oxides and oxyhydroxides. Fe2O33H2O can also be synthesized in laboratory settings through various chemical precipitation methods, typically involving the reaction of iron(III) salts with bases.

In terms of applications, hydrated ferric oxide has been explored for its potential in pigment production due to its color. It also finds use in some water treatment processes as a coagulant or adsorbent. Due to its association with rust, it is a visually recognizable compound in many environmental contexts. The exact structure and properties can vary slightly depending on the synthesis method and conditions.