3824.87.00.00 - Containing perfluorooctane sulfonic acid, its salts, perfluorooctane sulfonamides, or perfluorooctane sulfonyl fluoride

This HTS category, 3824.87.00.00, specifically classifies chemical products and preparations that contain perfluorooctane sulfonic acid (PFOS), its salts, perfluorooctane sulfonamides, or perfluorooctane sulfonyl fluoride. These substances are characterized by the presence of a perfluorooctane group, which imparts unique chemical and physical properties. Such preparations are typically used in various industrial applications, including in firefighting foams, surface treatments for textiles and paper, and as components in certain electronic manufacturing processes.

This classification is distinguished from its sibling categories by the specific chemical identity of the perfluorinated compounds present. For instance, it differs from 3824.81.00.00, which covers products containing oxirane, and from 3824.82, which pertains to products containing polychlorinated biphenyls (PCBs). The defining characteristic for 3824.87.00.00 is the presence of perfluorooctane derivatives, rather than other halogenated organic compounds or epoxides.

As this is a leaf node, there are no further subdivisions within this specific HTS code. Classification into 3824.87.00.00 hinges on the affirmative identification of PFOS, its salts, or related sulfonamide/sulfonyl fluoride compounds within the product's chemical composition. This requires careful analytical examination and adherence to the specific chemical nomenclature and substance definitions stipulated by international chemical conventions and the HTS.