2-Ethylbenzaldehyde, also known as o-ethylbenzaldehyde, is an aromatic aldehyde containing a benzene ring bearing adjacent ethyl and formyl substituents. Its IUPAC name is 2-ethylbenzaldehyde, and its molecular formula is C9H10O. The stated molecular weight is 134.17. The compound is identified by CAS number 22927-13-5 and is also listed under Benzaldehyde, 2-ethyl-, and 2-Ethyl benzaldehyde.
As an aromatic aldehyde, 2-ethylbenzaldehyde contains a reactive carbonyl group directly attached to an aromatic ring, while the neighbouring ethyl substituent influences its steric environment and electronic character. Aldehydes can participate in oxidation, condensation, and carbon-carbon bond-forming chemistry under suitable conditions. Actual appearance, odour, stability, and reactivity should be assessed from the specific material and process conditions.
Its established chemical context is as an intermediate or building block used by professional laboratories and manufacturers developing substituted aromatic molecules. Potential work may include exploratory synthesis, reference preparation, reaction studies, and route development. A common use category does not establish suitability for every formulation, analytical method, or downstream product; compatibility and reaction performance require application-specific assessment.
Selection should consider the intended transformation, aldehyde reactivity, neighbouring ethyl substitution, solvent system, catalysts, temperature, and sensitivity to air, moisture, or incompatible reagents. Users should review the applicable product documentation and conduct their own technical evaluation before scale-up. Storage, transfer, exposure controls, waste handling, and transport decisions should follow current regional requirements and the responsible organisation’s procedures. For commercial selection, the compound name should be considered separately from the specification and supplied form required for the intended process. Technical teams can use that distinction to compare documentation and application requirements without assuming that every listed material is interchangeable.