Anthracene-9-carboxylic acid (CAS No. 723-62-6) is an organic compound with the molecular formula C₁₅H₁₀O₂ and a molecular weight of 222.24. Its physical properties include pale yellow needle-like crystals, a melting point of 214-218℃ (with a ±3℃ difference in data from different sources), solubility in ethanol but slightly soluble in hot water. 9-anthracic acid is mainly used as a dye intermediate for the synthesis of various dyes and is widely applied in the textile, printing and dyeing and other industries. In addition, the carboxyl group (COOH) in its molecular structure endows it with reactivity, enabling it to participate in organic synthesis reactions such as esterification and acylation, and generate organic compounds with specific functions.
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