TCI N0051 N-(Naphthalen-2-yl)acetamide (CAS 581-97-5), also known as 2-acetamidonaphthalene, is an amide formed from 2-naphthylamine and an acetyl group. The compound is a positional isomer of the acetamido derivatives on the naphthalene ring system and is used as a non-heterocyclic building block as well as an analytical reference material. In the laboratory, its availability matters for work that requires a direct comparison between substitution at the alpha and beta positions, whether in reaction mechanism studies, spectral mapping, or the development of separation methods that must resolve two closely related isomers.
The properties that make this compound valuable are the high stability of the amide bond combined with the linear geometry characteristic of beta substitution on naphthalene. This straighter molecular shape produces crystal packing patterns, melting behaviour, and chromatographic behaviour that differ from those of the alpha isomer, which makes the compound a highly useful comparison standard in identification work. Its naphthalene core provides strong ultraviolet absorption together with distinctive infrared and nuclear magnetic resonance spectral patterns, and it dissolves readily in polar organic solvents such as ethanol and methanol.
In Indonesian laboratories, this material is typically held by synthetic and analytical chemistry groups in universities, research institutes, and industrial quality control units. It serves as a starting material in the preparation of naphthalene derivatives and as a reference substance when analysts need to confirm the identity of a peak or a spectral signal. Because it addresses the recurring problem of distinguishing very similar isomers, it is commonly kept as part of a standing reference collection rather than being ordered for a single experiment.
Related TCI products
- Non-heterocyclic building block synthesis: the stable amide bond and reactive naphthalene core allow the molecule to be carried through multi-step routes toward more elaborate naphthalene derivatives without degradation of the acetamido group.
- Analytical reference standard: laboratories use the compound as a comparison substance to confirm the identity of unknown peaks and signals, since its spectral and chromatographic behaviour is well defined and reproducible.
- Isomer differentiation studies: the beta-substituted geometry gives a chromatographic and spectroscopic profile distinct from the alpha isomer, making it essential for work that must reliably separate and identify the two.
- Reaction mechanism investigation: researchers comparing how alpha and beta substitution on naphthalene influences reactivity require both positional isomers, and this compound supplies the beta reference point for such studies.
- Separation method development: analysts validating new chromatographic conditions rely on this compound to demonstrate that a method genuinely resolves closely related naphthalene acetamide isomers rather than merely eluting them together.
| Brand | TCI |
|---|---|
| CAS number | 581-97-5 |
| Molecular formula | — |
| Purity | — |
| Category | Chemistry > Building Blocks > Non-Heterocyclic Building Blocks |
| Pack sizes | available in standard TCI research and laboratory pack sizes; please confirm the size required when ordering |
| Physical form | — |
| Storage | store in a cool, dry place in a tightly closed container, protected from light |
- Chemical name: N-(Naphthalen-2-yl)acetamide, also known as 2-acetamidonaphthalene
Store the compound in a cool, dry area in its original tightly closed container, kept away from direct sunlight, moisture, and sources of heat or ignition. Amber glass or other light-protecting containers with secure closures are suitable, and the container should be resealed promptly after each use to limit exposure to atmospheric moisture. Handle the material in a well-ventilated area or fume hood, wearing a laboratory coat, safety glasses, and chemical-resistant gloves, and avoid generating or inhaling dust. Keep the compound separate from strong oxidising agents, label all working solutions clearly, and consult the manufacturer's safety data sheet before first use and before any disposal of residues.
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