2921.49 - Other:

This HTS category, 2921.49, encompasses a range of aromatic monoamines and their derivatives that are not specifically classified under preceding subheadings within the 2921.4x group. It serves as a residual category for these compounds, capturing those aromatic monoamines and their salts that do not fall into the more specifically defined groups such as aniline, its derivatives, toluidines, diphenylamine, or naphthylamines. The classification here is based on the chemical structure of the compound, specifically the presence of an amino group directly attached to an aromatic ring, and the absence of other specific defining characteristics that would place it in a sibling category.

To distinguish this category from its siblings, one must carefully examine the specific chemical identity of the substance. For instance, if a substance is aniline or a direct derivative of aniline (like N-phenylaniline), it would be classified under 2921.41 or 2921.42 respectively. Similarly, compounds derived from toluidines or diphenylamine will find their place in their designated sibling categories. Category 2921.49 is therefore crucial for accurately classifying a diverse array of aromatic amines that do not fit the more narrowly defined classifications.

Within this category, specific subheadings exist to provide further granularity for distinct compounds. For example, 2921.49.10.00 specifically enumerates several important aromatic amines and their salts, such as 4-Amino-2-stilbenesulfonic acid, p-Ethylaniline, and various xylidines. Another subheading, 2921.49.15.00, covers m-Nitro-p-toluidine. The presence of these detailed subcategories indicates that even within this broad residual heading, there is an effort to isolate and clearly define specific, commercially significant aromatic monoamines and their derivatives.