3402.39.10.00 - Aromatic or modified aromatic

This HTS subheading, 3402.39.10.00, specifically covers aromatic or modified aromatic anionic organic surface-active agents that are not sold as part of a retail presentation. These agents are characterized by their chemical structure, containing at least one aromatic ring (such as benzene or naphthalene) that has been modified or is an integral part of the molecule. They function by reducing the surface tension of liquids, enabling them to mix with or emulsify substances that would otherwise be immiscible, such as oil and water. Examples include certain sulfonated aromatic compounds used as wetting agents, dispersants, or emulsifiers in industrial processes.

While this category deals with anionic aromatic surface-active agents for industrial use, its sibling category, 3402.39.90, encompasses all other anionic surface-active agents that do not fall under the specific aromatic criteria of 3402.39.10.00. The distinction lies in the presence and nature of the aromatic component within the molecule's structure. If the surface-active agent contains an aromatic ring system, it will likely be classified here. If it is anionic but lacks a clearly defined aromatic structure, it would fall into the "other" category at the same level.

As this is a leaf node in the HTS database, there are no further subcategories to introduce. Therefore, the classification of a product under 3402.39.10.00 relies on a thorough examination of its chemical composition to confirm the presence of aromatic or modified aromatic moieties and its anionic character, along with the verification that it is not prepared for direct sale to the end consumer.