Naphthol
| Formula | C10H8O |
| Chemical formula | C10H7OH |
| Density | 1.28g/cm3 |
| Molar mass | 144.17 g/mol |
| Bulk density | ~ 450 kg/m3 |
| CAS number | 90-15-3 |
| HS Code | 29071510 |
| EC number | 201-969-4 |
| Storage | storage 15 to 25 °C |
| SDS | available |
| RTECS | QL2800000 |
| R phrase | R 21/22-37/38-41 |
| S phrase | S 22-26-37/39 |
| Odour | phenol like |
| Form | solid |
| Color | white to bluish |
| Ignation temprature | 510 °C |
| Assay | ≥ | 99 | % |
| Description | Conforms | ||
| Identification | Conforms | ||
| Solubility | Conforms | ||
| Color of solution | Conforms | ||
| Melting range | 94.0 – 96.0 | °C | |
| Acidity | ≥ | 0.1 | ml |
| Residue on ignation | ≥ | 0.1 | % |
| Heavy metals | ≥ | 0.001 | % |
Naphthol refers to a group of isomeric organic compounds derived from naphthalene, primarily used in dyes, chemical synthesis, and as reagents in analytical chemistry.
🏭⚗️ Production
Naphthols are typically produced by the hydroxylation of naphthalene via chemical reactions such as sulfonation followed by alkaline hydrolysis. The products, mainly 1-naphthol and 2-naphthol, are purified through recrystallization and stored as crystalline solids protected from moisture and light.
🔬 Properties
Naphthols appear as colorless to pale yellow crystalline solids with characteristic phenolic odor. They are sparingly soluble in water but soluble in organic solvents like ethanol and ether. Naphthols have acidic phenolic hydroxyl groups and exhibit moderate chemical reactivity.
🧪 Applications
Naphthols are widely used as intermediates in the manufacture of dyes, pigments, and antioxidants. They serve as reagents in chemical analysis, and in the synthesis of pharmaceuticals and agrochemicals.
⚠️ Safety
Handle with care; naphthols can cause skin and eye irritation and may be harmful if inhaled or ingested. Use gloves, eye protection, and work in a well-ventilated area. Avoid prolonged exposure. Dispose of waste according to local chemical safety regulations.
