1,5-Naphthalenedisulfonic Acid (CAS 81-04-9) Technical Guide
Table of Contents
- Product Overview & Specifications
- Key Applications & Industry Uses
- Technical Parameter Comparison
- Operational Guidelines
- Industry Case Studies
- Procurement Guidance
Product Overview & Specifications
Chemical Name: 1,5-Naphthalenedisulfonic Acid
CAS No.: 81-04-9
Molecular Formula: C10H8O6S2
Molecular Weight: 288.30 g/mol
Synonyms: Armstrong’s Acid, Sulfonated Tussic Acid, L Acid, 1,5-NDSA
Physical Properties
| Parameter | Value |
|---|---|
| Appearance | White crystalline powder |
| Melting Point | 240-245°C |
| Solubility | Water: 500 g/L (20°C), Ethanol: Moderate |
| Density | 1.704 g/cm³ |
| Storage | Keep container tightly closed in dry, well-ventilated place |
Key Applications & Industry Uses
Primary Industrial Applications
- Dye Manufacturing: Critical intermediate for acid dyes and pigments
- Pharmaceuticals: Precursor for specialty chemicals in drug synthesis
- Chemical Synthesis: Used in production of 1,5-Dihydroxynaphthalene and Amino C Acid
- Research & Development: Key component in advanced material studies
Technical Parameter Comparison
| Parameter | Industrial Grade | Pharma Grade |
|---|---|---|
| Purity | ≥98% | ≥99.5% |
| Moisture Content | ≤15% | ≤0.5% |
| Heavy Metals | ≤50 ppm | ≤10 ppm |
| Packaging | 25kg woven bags | 5kg vacuum-sealed |
Operational Guidelines
Handling Recommendations
- Use chemical-resistant PPE (nitrile gloves, face shield)
- Maintain pH 6-8 in aqueous solutions to prevent decomposition
- Store below 30°C with relative humidity <60%
Industry Case Studies
Case 1: Specialty Dye Production
Client: Wuhan Xinxin Jiali Bio-Tech
Application: Manufacturing acid dyes for textile industry
Outcome: Achieved 22% increase in dye stability using optimized 1,5-NDSA formulations
Case 2: Pharmaceutical Intermediate Synthesis
Client: Central China Pharmaceutical Co.
Application: Production of sulfonamide drug intermediates
Result: Reduced reaction time by 35% through controlled sulfonation processes
Procurement Guidance
Supplier Evaluation Criteria
- ISO 9001 certification for chemical production
- Minimum 98% purity guarantee
- Batch-to-batch consistency documentation
Contact for Technical Consultation
Email: info@vivalr.com
Phone: (86) 15866781826
Available: Mon-Fri 8:00-17:00 (GMT+8)
Custom Synthesis Options
Available for orders above 500kg with:
– Customized purity levels (98-99.9%)
– Specialty packaging solutions
– Technical support documentation
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