2921.42.15.00 - N-Ethylaniline; andN,N-Diethylaniline

This HTS classification, 2921.42.15.00, specifically covers N-Ethylaniline and N,N-Diethylaniline. These are aromatic amine compounds derived from aniline, where hydrogen atoms on the amino group have been substituted by ethyl groups. N-Ethylaniline features one ethyl substitution, while N,N-Diethylaniline has two ethyl substitutions on the nitrogen atom. These compounds are primarily utilized as intermediates in the synthesis of dyes, pharmaceuticals, and other organic chemicals.

Within the broader category of aniline derivatives and their salts, this subcategory is distinguished by the specific ethyl substitutions on the amine nitrogen. For instance, it differs from 2921.42.10.00, which covers N,N-Dimethylaniline, where methyl groups replace the hydrogen atoms. Similarly, other sibling categories at this level encompass aniline derivatives with different substituents (e.g., halogen atoms, nitro groups, or sulfonic acid groups), or entirely different aromatic monoamine structures. The defining characteristic here is the presence and number of ethyl groups attached to the nitrogen atom of the aniline structure.

As this classification represents a leaf node within the HTS structure, there are no further subcategories. This means that any compound meeting the description of N-Ethylaniline or N,N-Diethylaniline, and not falling under a more specific provision (which is unlikely at this level of detail), will be classified under this code. Classification relies on identifying the chemical structure and confirming it aligns precisely with the described compounds.