HPLC Purity: Specification ≥98.0%; Test Result 98.50%.

Single Related Substance: Specification ≤0.50%; Test Result 0.25%. Total Related Substances: Specification ≤1.00%; Test Result 0.62%. Water Content: Specification ≤0.30%; Test Result 0.17%. Residue on Ignition: Specification ≤0.10%; Test Result 0.04%. Heavy Metals: Specification ≤10 ppm; Test Result <5 ppm. Melting Point: Specification 285–290 °C; Test Result 286–289 °C. Solubility: Complies with standard, soluble in hot water. Storage Condition: Tightly sealed, dry, room temperature and protected from light. Shelf Life: 24 months under standard storage conditions.

Conclusion: All test items comply with enterprise quality standard, product is qualified.

Important aromatic sulfonic acid fine chemical intermediate.

Widely used in dye industry for synthesis of reactive dyes, acid dyes and organic pigments. Applied as raw material for pharmaceutical synthesis and agrochemical intermediates. Also used in analytical chemistry reagents and organic synthesis raw materials.