2921.59.40.00 - Products described in additional U.S. note 3 to section VI

This HTS category, 2921.59.40.00, encompasses aromatic polyamines and their derivatives, as well as their salts, that do not fall under more specific classifications within heading 2921. These are organic compounds characterized by the presence of two or more amine (-NH2, -NHR, or -NR2) functional groups attached to aromatic rings. The designation "Products described in additional U.S. note 3 to section VI" signifies that the specific scope and conditions for inclusion are further detailed in the U.S. HTS Additional U.S. Notes for Section VI, which should be consulted for precise coverage.

This specific classification is distinguished from its sibling category, 2921.59.80, which covers "Other" aromatic polyamines and their derivatives and salts. The distinction lies in the fact that 2921.59.40.00 is reserved for those aromatic polyamines meeting the criteria outlined in Additional U.S. note 3 to section VI, implying a more granular or specific set of characteristics, uses, or compositional requirements. This requires careful examination of the additional U.S. notes to accurately differentiate between the two.

As this is a leaf node, there are no further subcategories. Therefore, classification under 2921.59.40.00 necessitates that the aromatic polyamine or its derivative meets all the general requirements for heading 2921 and the specific conditions stipulated by Additional U.S. note 3 to section VI, without fitting into any more narrowly defined HTS subheadings. Examples might include certain dyes, polymer intermediates, or specialized organic synthesis precursors that satisfy these particular conditions.