4-PHENYLAZO-1-NAPHTHYLAMINE
- CAS NO.：131-22-6
- Empirical Formula: C16H13N3
- Molecular Weight: 247.29
- MDL number: MFCD00034969
- EINECS: 205-018-4
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-04-24 14:58:21
What is 4-PHENYLAZO-1-NAPHTHYLAMINE?
Preparation
aniline diazotization, and Naphthalen-1-amine coupling.
Safety Profile
Mutation data reported. When heated to decomposition it emits toxic vapors of NOx.
Purification Methods
Crystallise the dye from cyclohexane or aqueous EtOH. [Brode et al. J Am Chem Soc 74 4641 1952, Beilstein 16 H 361, 16 III 406, 16 IV 546.]
Properties and Applications
brilliant red light yellow to brilliant yellow orange (mineral oil). Red acicular crystal, melting point 123 ℃. Soluble in alcohol and benzene. In concentrated sulfuric acid for magenta; After dilution for red light brown, precipitation, At 2% hot hydrochloric acid solution for magenta solution, there are residues. Dye alcohol solution to join concentrated sodium hydroxide solution for yellow brown. Used for oil, paraffin wax, paint color.
| Standard | Light Fastness | Heat-resistant(℃) | Water | Sodium Carbonate(5%) | Hydrochloric acid(5%) | |
| Melting point | Stable | |||||
| ISO | Well | 109 | 75 | Insoluble | No change | Poor |
Properties of 4-PHENYLAZO-1-NAPHTHYLAMINE
| Melting point: | 124°C |
| Boiling point: | 380.33°C (rough estimate) |
| Density | 1.1633 (rough estimate) |
| refractive index | 1.6470 (estimate) |
| solubility | Solubility Virtually insoluble in water; slightly soluble in ethanol; soluble in acetone, benzene,ethyl acetate, toluene, xylene |
| form | crystals |
| Colour Index | 11350 |
| pka | 2.70(at 25℃) |
| color | Dark red |
| PH Range | Red (3.7) to yellow (5.0) |
| λmax | 439nm |
| Major Application | Display device, semiconductor, sensors, photosensitive materials, recording materials, fooding materials, imaging materials, inks, engraving coatings, lubricants, hair dyes, food storage, dental materials |
| CAS DataBase Reference | 131-22-6(CAS DataBase Reference) |
| EPA Substance Registry System | 1-Naphthalenamine, 4-(phenylazo)- (131-22-6) |
Safety information for 4-PHENYLAZO-1-NAPHTHYLAMINE
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation |
| Precautionary Statement Codes |
P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P280:Wear protective gloves/protective clothing/eye protection/face protection. |
Computed Descriptors for 4-PHENYLAZO-1-NAPHTHYLAMINE
4-PHENYLAZO-1-NAPHTHYLAMINE manufacturer
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