1-Aminoanthraquinone-5-sulfonic acid sodium salt (CAS 4095-82-3) has a molecular formula of C??H?NNaO?S and a molecular weight of 325.27 g/mol, featuring an amino group (-NH?), a sulfonate sodium salt (-SO?Na), and a quinone moiety on the anthracene core. As an anthraquinone derivative, it is widely used as a dye intermediate (for synthetic colorants) and in textile printing, leveraging its chromophoric structure. It requires sealed, cool, dry storage to prevent discoloration or degradation, ensuring stability for dye synthesis and industrial applications.