2917.19 - Other:

This HTS category, 2917.19, encompasses "other" acyclic polycarboxylic acids, their anhydrides, halides, peroxides, peroxyacids, and their derivatives not specifically classified elsewhere within the 2917.1 series. It serves as a residual category for compounds that possess multiple carboxyl groups on an open carbon chain and are not explicitly defined by sibling HTS codes. These can include a variety of organic acids and their related functional derivatives.

Distinguishing 2917.19 from its sibling categories is crucial for accurate classification. For instance, while 2917.11 covers oxalic acid, 2917.12 addresses adipic acid, and 2917.13 pertains to azelaic and sebacic acids, 2917.19 captures acyclic polycarboxylic acids that fall outside these specific definitions. Similarly, maleic anhydride, classified under 2917.14, is a distinct entity. This category is for those acyclic polycarboxylic acid derivatives that do not fit into the more precisely defined subheadings above them.

The subcategories within 2917.19 further refine the classification of these "other" acyclic polycarboxylic acids and their derivatives. For example, specific items like ferrous fumarate (2917.19.10.00) and malonic acid (2917.19.35.00) are listed, along with more complex descriptions that encompass fumaric acid and its derivatives, maleic acid, succinnic acid, glutaric acid, and other related compounds, provided they meet the criteria of being acyclic and not elsewhere specified. The existence of these subcategories highlights the need to examine the specific chemical structure and origin of the imported goods to ensure they are correctly assigned within this broad residual heading.