Overview
2-Naphthylamine (CAS 91-59-8 ), also known as beta-naphthylamine, is an aromatic amine historically used as a chemical intermediate in the synthesis of dyes, rubber antioxidants, and pharmaceutical compounds.
Its primary commercial role is as a building block in organic synthesis, where it contributes to the construction of complex nitrogen-containing ring systems for various industrial applications.
In dye manufacturing, it serves as a precursor to azo dyes used in textile and leather coloring processes. Agrochemical producers have utilized it in the synthesis of certain pesticide intermediates.
The naphthalene-amine structure provides a reactive site for further functionalization. Pharmaceutical intermediate synthesis draws on its reactivity to build naphthalene-based active compound scaffolds.
It has also appeared in rubber processing chemistry as a starting material for antioxidant production. This versatility makes it a valuable, though highly regulated, component in specialized chemical manufacturing.
2-Naphthylamine is supplied as a solid crystalline material. Technical-grade material is the standard commercial form available to industrial buyers seeking high-purity precursors for synthesis.
Due to significant regulatory restrictions in many jurisdictions, including classification as a confirmed human carcinogen, procurement requires careful verification of local compliance requirements before sourcing.
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Physical Properties
| Melting Point | 111-113 °C |
| Boiling Point | 306 °C |
| Density | 1.061 g/cm³ @ Temp: 98 °C |
| Appearance | 2-Naphthylamine is a white to red crystals with a faint, aromatic odor. Darkens in air to a reddish-purple color. |
| Color | pink to purple |
| Form | powder |
| Water Solubility | <0.1 g/100 mL at 22 ºC |
| Vapor Pressure | 2.56 x 10 -4 mmHg at 20–30 °C (quoted, Mercer et al., 1990) |
| Refractive Index | 1.5000 (estimate) |
Safety & Handling
Danger GHS07 GHS08 GHS09 Hazard Statements H302 Harmful if swallowed H341 Suspected of causing genetic defects H350 May cause cancer H400 Very toxic to aquatic life H410 Very toxic to aquatic life with long lasting effects H411 Toxic to aquatic life with long lasting effects Precautionary Statements P203 Obtain, consult and follow expert instructions for use. P264 Wash … thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P318 IF exposed or concerned, get medical advice. P330 Rinse mouth. P391 Collect spillage. P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P301+P317 Get emergency medical help.
Trade & Regulatory
| HS Code | 29214500 |
| UN Number | 1650 |
| ADR Class | 6.1 |
| Packing Group | II |
| WGK (Germany) | 3 |
Other Names
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Chemical Properties
- CAS Number
- 91-59-8
- EC Number
- 202-080-4
- Mol. Weight
- 143.18
- HS Code
- 29214500
- Category
- Agrochemicals