Chemistry (huà xué) is the scientific study of matter—its composition, structure, properties, and the changes it undergoes during chemical reactions. The character 化 (huà) means 'to change' or 'to transform', reflecting chemistry’s focus on how substances interact and convert into new forms. 学 (xué) means 'study' or 'learning', so together 化学 literally means 'the study of transformation'—a precise description of chemistry’s core purpose.

This word is used broadly in academic, medical, industrial, and everyday contexts—for example, when discussing pharmaceuticals, environmental science, food additives, or lab experiments. It appears in compound words like 化学反应 (chemical reaction), 化学元素 (chemical element), and 化学实验室 (chemistry laboratory). As a formal academic discipline, 化学 is typically taught as a required science subject in Chinese schools and universities.