1-Nitroso-2-Naphthol (CAS 131-91-9): Comprehensive Guide
Table of Contents
- Product Overview & Specifications
- Applications & Industrial Uses
- Usage Guidelines & Safety
- Case Studies
- Client Success Stories
- Request a Quote
1. Product Overview & Specifications
| Parameter | 1-Nitroso-2-Naphthol | Similar Compounds |
|---|---|---|
| CAS Number | 131-91-9 | N/A |
| Molecular Formula | C10H7NO2 | Varies by derivative |
| Appearance | Yellow to orange crystalline powder | Dependent on functional groups |
| Solubility | Soluble in organic solvents (e.g., ethanol, DMSO) | Lower solubility in polar solvents |
| Melting Point | 155-160°C | Varies (e.g., 2-Naphthol: 121-123°C) |
| Storage | 2-8°C, dry, away from light | Similar for nitroso compounds |
2. Applications & Industrial Uses
Key Applications:
- Organic Synthesis: Intermediate for dyes, pigments, and pharmaceuticals.
- Analytical Chemistry: Chelating agent for metal ion detection (e.g., cobalt in alloys).
- Polymer Industry: Stabilizer or catalyst in polymerization reactions.
- Corrosion Inhibition: Used in metal surface treatment formulations.
3. Usage Guidelines & Safety
Handling Recommendations:
- Wear PPE: gloves, goggles, and lab coat.
- Avoid inhalation or direct skin contact.
- Store in airtight containers under inert gas (e.g., nitrogen).
Disposal:
- Follow local regulations for nitroaromatic compounds.
- Neutralize with alkaline solutions before disposal.
4. Case Studies
Case 1: Dye Manufacturing Optimization
Challenge: A European chemical plant required a high-purity intermediate for azo dye synthesis. Traditional methods yielded impurities ≥5%.
Solution: Used 1-nitroso-2-naphthol at controlled pH (6.5-7.0) with gradual temperature ramping.
Result: Final product purity increased to 99.2%, reducing downstream purification costs by 18%.
Case 2: Cobalt Detection in Battery Materials
Challenge: Rapid quantification of cobalt in Li-ion battery cathodes with ±0.5% accuracy.
Solution: Developed a colorimetric assay using 1-nitroso-2-naphthol (0.1% w/v in ethanol).
Result: Achieved 98.7% recovery rate with <2% RSD across 50 samples.
5. Client Success Stories
Client A: Specialty Chemicals Manufacturer (Germany)
- Usage: 200 kg/month for phthalocyanine pigment production
- Outcome: 15% faster reaction kinetics vs. alternative nitroso compounds
- Testimonial: “Consistent quality reduced batch failures by 30%.”
Client B: Analytical Services Lab (USA)
- Usage: 5 kg/year for EPA-compliant metal testing
- Outcome: Passed ISO 17025 audits with 0 non-conformities
- Testimonial: “Detection limits improved from 0.1 ppm to 0.05 ppm.”
6. Request a Quote or Sample
Contact our technical team for:
- Custom purity grades (98% to 99.9%)
- Bulk pricing (25 kg drum discounts)
- MSDS & COA documentation
Email: info@vivalr.com
Tel: (86) 15866781826



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