Methylammonium chloride is a chemical compound with the formula CH₃NH₃Cl. It consists of a methylammonium cation and a chloride anion. This compound is often used in various chemical reactions and can serve as a precursor in the synthesis of other materials, including perovskite solar cells. In its solid form, methylammonium chloride appears as white crystals and is soluble in water. It is important in research and industrial applications, particularly in the field of materials science and organic chemistry. Proper handling and storage are essential due to its potential effects on health and the environment.