1. Product Overview and Specifications

4-Aminotoluene-3-sulfonic Acid (CAS 88-44-8), also known as 4-Amino-m-toluenesulfonic acid, is an aromatic sulfonic acid derivative with the molecular formula C₇H₉NO₃S. Key technical parameters include:

2. Key Applications and Industrial Uses

2.1 Dye Intermediate

Primary use as a coupling component in azo dye synthesis for textiles and paper industries. Enables production of light-fast yellow and orange hues.

2.2 Pharmaceutical Synthesis

Critical intermediate for sulfonamide drugs and specialty APIs. Used in synthesis of COX-2 inhibitors and antimicrobial agents.

3. Parameter Comparison with Similar Compounds

4. Step-by-Step Usage Guidelines

4.1 Dye Manufacturing Process

1. Prepare 5% NaOH solution at 40°C
2. Dissolve compound at 1:5 molar ratio
3. Maintain pH 8-9 during diazotization

5. Real-World Customer Case Studies

Case 1: European Dyestuff Manufacturer

Challenge: Needed replacement for carcinogenic benzidine-based dyes
Solution: Implemented CAS 88-44-8 in new eco-friendly dye line
Result: Achieved REACH compliance + 18% production efficiency gain

Case 2: Asian API Producer

Challenge: Impurities in sulfa drug intermediate
Solution: Upgraded to 99.5% purity grade
Result: Reduced purification steps by 40%

6. Request a Quote or Technical Support

Contact our chemistry experts for:

• Custom purity grades (95%-99.9%)
• Bulk pricing (25kg drum quantities)
• Regulatory documentation support

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