1-(1-naphthylazo)-2-naphthol
- CAS NO.：2653-64-7
- Empirical Formula: C20H14N2O
- Molecular Weight: 298.34
- MDL number: MFCD00398528
- EINECS: 220-176-4
- SAFETY DATA SHEET (SDS)
- Update Date: 2025-12-31 14:38:37
What is 1-(1-naphthylazo)-2-naphthol?
Preparation
Naphthalen-1-amine diazotization and Naphthalen-2-ol coupling.
Properties and Applications
yellow red. From toluene in the crystallization product melting point 224 ℃. Soluble in hot ethanol and benzene in red. In concentrated sulfuric acid to red light blue, dilution to red light purple solution, and then have red brown precipitation. Dye ethanol solution to join concentrated hydrochloric acid is dark red; Join concentrated sodium hydroxide solution for bright red light brown. Mainly used in oil, fat and wax, soap coloring.
| Standard | Light Fastness | Heat-resistant(℃) | water | Sodium Carbonate(5%) | Hydrochloric acid(5%) | |
| Melting point | Stable | |||||
| ISO | General | 220 |
150≥ 220
Sublimation |
Insoluble | No change | No change |
Properties of 1-(1-naphthylazo)-2-naphthol
| Melting point: | 230 °C |
| Boiling point: | 530.2±33.0 °C(Predicted) |
| Density | 1.20±0.1 g/cm3(Predicted) |
| pka | 12.03±0.50(Predicted) |
| form | powder to crystal |
| color | Orange to Brown to Dark purple |
| CAS DataBase Reference | 2653-64-7 |
| EPA Substance Registry System | 2-Naphthalenol, 1-(1-naphthalenylazo)- (2653-64-7) |
Safety information for 1-(1-naphthylazo)-2-naphthol
Computed Descriptors for 1-(1-naphthylazo)-2-naphthol
1-(1-naphthylazo)-2-naphthol manufacturer
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