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2-(3-amino-4-methoxyphenylamino)ethanol sulfate; CAS No.: 83763-48-8; 2-(3-amino-4-methoxyphenylamino)ethanol sulfate. PROPERTIES: 2-(3-amino-4-methoxyphenylamino)ethanol sulfate is a white to off-white crystalline powder with a molecular formula of C9H14N2O3 {H2SO4. It has a molecular weight of 278.28 g/mol and a melting point of approximately 195-200 C (decomposition). The compound is freely soluble in water and exhibits pH-dependent solubility in organic solvents. It is hygroscopic and should be stored in a desiccator at room temperature, protected from light. Safety precautions include using respiratory protection when handling powder forms. It is classified as a category 3 eye irritant under GHS classification. APPLICATIONS: 2-(3-amino-4-methoxyphenylamino)ethanol sulfate is utilized in the pharmaceutical industry as a key intermediate in the synthesis of nonsteroidal anti-inflammatory drugs (NSAIDs), particularly those targeting COX-2 selectivity. Its sulfated amino group provides essential hydrogen bonding interactions with target enzymes. In the field of analytical chemistry, this compound serves as a derivatizing agent for the spectrophotometric determination of trace metals in environmental samples, as described in Analytical Chemistry. Additionally, it functions as a building block for the synthesis of fluorescent DNA intercalators, where its aromatic amine group contributes to intercalation between base pairs. The compound is also employed in the preparation of ion-selective electrodes for potassium ion detection, as reported in the journal Electroanalysis, due to its ability to form stable complexes with alkali metal ions.