2918.99.43.00 - Products described in additional U.S. note 3 to section VI

This HTS classification, 2918.99.43.00, specifically covers products within Chapter 29 that fall under the broader category of carboxylic acids with additional oxygen function and their derivatives, but are not classified under more specific subheadings within the "Other" categories. The defining characteristic for this code is that the products must be described in Additional U.S. Note 3 to Section VI. This note provides specific rules and definitions that govern the classification of certain chemical substances, often relating to their intended use, purity, or specific manufacturing processes, which deviate from general classification principles.

Distinguishing this category from its sibling, 2918.99.47.00, is crucial. While both fall under "Other" within the aromatic carboxylic acid derivatives, the 2918.99.43.00 code is exclusively for those substances that meet the criteria outlined in Additional U.S. Note 3. The sibling category, 2918.99.47.00, would therefore encompass any remaining aromatic carboxylic acid derivatives that do not satisfy the conditions of that specific U.S. note. Careful examination of the substance's properties against the stipulations of Additional U.S. Note 3 is paramount for accurate classification.

As this is a leaf node, there are no further subcategories within 2918.99.43.00. Classification at this level requires a thorough understanding of Additional U.S. Note 3. Examples of products that might be classified here would be specific aromatic carboxylic acid derivatives that are listed or defined by Additional U.S. Note 3, such as certain pharmaceutical intermediates or specialty chemicals whose tariff treatment is specifically addressed by this note, regardless of their exact chemical structure beyond meeting the overarching criteria of Chapter 29.