2917.19.40.00 - Derived in whole or in part from aromatic hydrocarbons

This HTS classification, 2917.19.40.00, specifically covers acyclic polycarboxylic acids, their anhydrides, halides, peroxides, peroxyacids, and their derivatives that are derived in whole or in part from aromatic hydrocarbons. This means the core chemical structure of the product must include an aromatic ring, and it must also possess two or more carboxylic acid functional groups (or their related derivatives such as anhydrides, halides, etc.) on an acyclic chain. Examples could include aromatic substituted dicarboxylic acids or their functional equivalents where the aromatic nature is inherent to the molecule.

This category is distinguished from its sibling, 2917.19.70, which is also categorized under "Other acyclic polycarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives." The key differentiator lies in the origin of the hydrocarbon component. While 2917.19.70 would cover acyclic polycarboxylic acids derived from non-aromatic hydrocarbon sources, 2917.19.40.00 is exclusively for those where an aromatic hydrocarbon forms a significant part of the molecular structure.

As a leaf node within the HTS structure, this classification does not have further subdivisions. Therefore, the focus for classification within 2917.19.40.00 is on the precise identification of the polycarboxylic acid derivative and confirmation that it meets the criterion of being derived, wholly or partly, from aromatic hydrocarbons. Careful examination of chemical composition and structural properties is essential for accurate classification under this heading.