2921 - Amine-function compounds
Sub-classifications
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2921 1100 00
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2921 1201 00
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2921 1300 00
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2921 19
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Overview
Category 2921 encompasses a broad range of organic compounds characterized by the presence of one or more amine functional groups. These compounds are vital intermediates and final products across various chemical industries, including pharmaceuticals, agrochemicals, dyes, and polymers. The defining feature is the nitrogen atom bonded to at least one alkyl or aryl group, forming primary (RNH2), secondary (R2NH), or tertiary (R3N) amines, along with their derivatives such as quaternary ammonium salts.
This category is situated within Chapter 29, which deals exclusively with organic chemicals. Unlike sibling categories at the Chapter or Section level that might cover broader classes of organic compounds or different types of chemicals entirely (e.g., alcohols, acids, or inorganic substances), HTS 2921 specifically focuses on the amine functional group as the primary classifying characteristic.
The subdivisions within HTS 2921 further refine classification based on the structure of the carbon skeleton to which the amine group is attached. This includes distinctions between acyclic amines (those with non-cyclic carbon chains), cyclanic, cyclenic, or cycloterpenic amines (those with cyclic carbon structures), and aromatic amines (those where the amine group is directly attached to an aromatic ring). These subcategories allow for precise identification of specific amine types, crucial for determining applicable duties, import regulations, and trade statistics.