2-Amino-4-sulfobenzoic acid
CAS: 98-43-1
Category: Organic Intermediates
| Purity | Industrial Grade ≥98%; Reagent Grade ≥99%; High-Purity Grade ≥99.5% |
| Molecular Formula | C7H7NO5S |
| Molecular Weight | 217.20 |
| Appearance | White to off-white crystalline powder or crystalline solid, odorless, slightly soluble in water |
| Packaging | 1 kg/aluminum foil bag, 5 kg/aluminum foil bag, 25 kg/fiber drum with polyethylene inner liner |
| Testing Indicators | Appearance — Visual inspection; Identification — FTIR spectroscopy and NMR analysis; Purity — HPLC-UV determination; Assay of sulfonic acid and amino groups — acid-base titration and derivatization analysis; Water content — Karl Fischer titration (GB/T 6283); Sulfate and inorganic impurities — Ion chromatography; Heavy metals — ICP-MS; Residual solvents — GC analysis according to ICH Q3C guidelines; Melting/decomposition point — Capillary method. |
| Storage Notes | Store in a cool, dry, and well-ventilated area. Keep the container tightly closed and protected from moisture and direct sunlight. Avoid contact with strong oxidizing agents, strong bases, and reactive chemicals. Use appropriate protective equipment to prevent dust inhalation during handling. |
| Lead Time | 10 days |
2-Amino-4-sulfobenzoic acid is an aromatic sulfonic acid derivative used as an important organic intermediate. It is mainly applied in the synthesis of dyes, fluorescent whitening agents, pigments, pharmaceutical intermediates, and specialty organic compounds. It can also be used as a starting material for azo compounds and heterocyclic synthesis due to the presence of amino, carboxyl, and sulfonic acid functional groups.