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2-Aminoterephthalic acid (abbreviated as 2-ATA), with the molecular formula C₈H₇NO₄ and a molecular weight of 181.15, is an amino-containing aromatic dicarboxylic acid. It typically appears as a white to pale yellow crystalline powder and is widely used as an important organic intermediate in materials and pharmaceutical synthesis.
| Item | Specification |
| Melting point | 324°C (dec.) (lit.) |
| Boiling point | 450.7°C (760 mmHg) |
| Density | 1.6 ± 0.1 g/cm³ |
| Refractive index | 1.5468 (estimate) |
| Flash point | 226.4 ± 27.3 °C |
| Acidity coefficient (pKa) | 3.95 ± 0.10 (Predicted) |
| Solubility | Sparingly soluble in water; soluble in strongly polar solvents such as methanol and ethanol; readily soluble in alkaline solutions. |
| Chemical Properties | Contains both an amino group (-NH₂) and two carboxyl groups (-COOH), exhibiting the reactivity of both amines and carboxylic acids; capable of participating in condensation, coordination, and other reactions. |
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