Table of Contents
Sodium 2-Naphthol-7-Sulfonate (CAS 135-55-7) Overview
Chemical Profile
| Parameter |
Specification |
| CAS Number |
135-55-7 |
| Molecular Formula |
C10H7NaO4S |
| Appearance |
White to off-white crystalline powder |
| Purity |
≥98% (HPLC) |
| Solubility |
Water soluble (50 mg/mL at 20°C) |
Technical Specifications Comparison
| Vendor |
Purity |
Moisture Content |
Packaging |
| Manufacturer A |
99% |
≤0.5% |
25kg/drum |
| Manufacturer B |
98.5% |
≤1.2% |
20kg/carton |
| Manufacturer C |
97% |
≤2.0% |
50kg/barrel |
Industrial Applications
Dye Intermediate Applications
Primary use as coupling component in azo dye synthesis for:
- Textile colorants (cotton/polyester blends)
- Leather tanning auxiliaries
- Paper coating pigments
Pharmaceutical Uses
- Intermediate in sulfa drug synthesis
- Analytical reagent for protein detection
Operational Guidelines
Recommended Handling Parameters
| Process Stage |
Temperature Range |
pH Requirement |
| Diazotization |
0-5°C |
1.5-2.5 |
| Coupling Reaction |
5-10°C |
4.0-5.0 |
Documented Case Studies
Case 1: Textile Dye Manufacturer (Hangzhou, China)
- Application: Developed wash-fast red dyes for sportswear
- Result: 23% improvement in color fastness rating
- Consumption: 850kg/month production scale
Case 2: Pharmaceutical Intermediate Supplier (Mumbai, India)
- Application: Sulfonamide drug intermediate synthesis
- Result: 99.2% purity achieved in final API
- Batch Size: 500-800kg per production run
Technical Consultation & Ordering
For formulation support or bulk pricing:
| Contact Method |
Details |
| Email |
info@vivalr.com |
| Phone |
(86) 15866781826 |
| Lead Time |
2-3 weeks for sample requests |
Request SDS documentation or specification sheets:
- Available in PDF/MSDS format
- Custom packaging solutions
- Technical support for process optimization
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