3402.39 - Other:

This HTS category, 3402.39, encompasses anionic organic surface-active agents that are not linear alkylbenzene sulfonic acids or their salts, and are not specifically prepared for retail sale. These agents are chemical compounds that reduce the surface tension of liquids, facilitating processes such as wetting, emulsifying, dispersing, and foaming. They are utilized in a wide array of industrial and commercial applications, including textile processing, leather manufacturing, pulp and paper production, and in the formulation of various cleaning and degreasing products.

Distinguishing this category from its sibling, 3402.31, is crucial. While both fall under anionic organic surface-active agents, 3402.31 specifically pertains to linear alkylbenzene sulfonic acids and their salts. Therefore, 3402.39 covers all other anionic organic surface-active agents, excluding those explicitly defined by their chemical structure in the sibling category. This means agents with different aromatic or aliphatic structures, or those derived from alternative feedstocks, would typically be classified here if they meet the anionic surface-active criteria.

The subcategories within 3402.39 further refine the classification based on the specific type of organic molecule involved. Subcategory 3402.39.10.00 addresses aromatic or modified aromatic anionic surface-active agents, which possess a core aromatic ring structure. The residual subcategory, 3402.39.90, serves as a catch-all for any other anionic organic surface-active agents that do not fit the "aromatic or modified aromatic" description, ensuring comprehensive coverage for this broad class of chemicals.