2-naphthylamine
Description
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.
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 (Learn More)
Trade & Regulatory
| HS Code | 29214500 |
| UN Number | 1650 |
| ADR Class | 6.1 |
| Packing Group | II |
| WGK (Germany) | 3 |
Documentation
Other Names
beta-naphthylamine|6-naphthylamine|2-aminonaphthalene|BNA|naphthalen-2-amine|2-Naphthalenamine|beta-Naftilamina|2-Naphthalamine
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