1-Naphthylamine TCI N0052

TCI N0052 1-Naphthylamine (CAS 134-32-7) is a primary aromatic amine in which the amino group is attached at the alpha position of the naphthalene ring system. The compound is one of the classical building blocks of organic chemistry and serves as the starting point for many synthetic routes leading to azo dyes, analytical reagents, and a wide range of bioactive compounds. In the laboratory its role covers diazotisation reactions, the formation of amides and sulfonamides, and use as a coupling component in colour-forming reactions. Its standing as a highly versatile starting material keeps it relevant even though it has been known in the organic chemistry literature for a very long time.

The characteristics that determine how this compound is used are the high nucleophilicity of its amino group and the ability of the naphthalene core to delocalise charge. The amino group strongly activates the ring towards electrophilic substitution and directs incoming groups to specific positions, so the compound is readily nitrated, halogenated, or sulfonated. In diazotisation reactions, the diazonium salt that is formed can be coupled with phenols or with other amines to produce dyes of high colour intensity. The same reactivity works in the other direction as well: this activated character makes the compound easy to oxidise on exposure to air and light, which is why its condition on receipt and during storage deserves attention.

In Indonesian laboratories, 1-Naphthylamine is typically encountered in organic synthesis work, in dye chemistry, and in analytical method development where a reactive aromatic amine is required as a coupling partner or as an intermediate. Research groups in universities, industrial R&D units, and quality-control laboratories draw on it when a well-characterised naphthalene-based amine is needed, and the TCI catalogue designation N0052 makes it straightforward to specify and reorder the same material consistently across repeated experiments.

• Diazotisation and azo dye synthesis: the primary aromatic amino group converts cleanly to a diazonium salt that couples with phenols or amines to give intensely coloured azo products.
• Analytical colour reagent preparation: its behaviour as a coupling component in colour-forming reactions makes it suitable for building reagents used in visual and spectrophotometric detection work.
• Amide and sulfonamide formation: the nucleophilic amino group reacts readily with acylating and sulfonylating agents, providing a direct route to naphthalene-based amide and sulfonamide derivatives.
• Electrophilic aromatic substitution studies: the strongly activating amino group promotes nitration, halogenation, and sulfonation while directing substitution to defined positions on the ring.
• Multi-step synthesis of bioactive compounds: as a classical building block it serves as the opening intermediate in synthetic routes toward more elaborate naphthalene-containing target molecules.

• Catalogue number: N0052

Store the container tightly closed in a cool, dry, well-ventilated place, protected from light and from prolonged contact with air, since the activated aromatic amine is easily oxidised under these conditions. Keep the material in its original supplier packaging or in an equivalent chemically compatible, light-protecting container that is clearly labelled. Handle inside a functioning fume hood and wear appropriate personal protective equipment, including gloves, safety glasses, and a laboratory coat. Avoid skin contact, inhalation of dust or vapour, and contact with strong oxidising agents. Weigh and transfer with clean, dry equipment, reseal promptly after use, and follow the supplier safety data sheet together with your institution's chemical waste handling procedures for disposal.

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