9902.10.30 - Mixture of phenyl esters of C10-C18 alkylsulfonic acids (CAS No. 70775-94-9) (provided for in subheading 3812.20.10)

This HTS category, 9902.10.30, covers a specific mixture of phenyl esters derived from C10-C18 alkylsulfonic acids, identified by CAS Number 70775-94-9. While the primary classification of this substance, based on its chemical composition and function as a performance-enhancing additive or processing aid, would typically fall under subheading 3812.20.10 (Mixtures containing halogenated derivatives of methane, ethane or propane; mixtures of halogenated derivatives of methane, ethane or propane, or unsaturated hydrocarbons with organo-phosphorus compounds, etc.), this specific entry in Chapter 99 indicates a temporary or modified tariff treatment. Therefore, goods classified here are subject to special provisions, potentially temporary modifications proclaimed pursuant to trade agreements or additional import restrictions under Section 22 of the Agricultural Adjustment Act.

This category is unique as it is a "leaf node" within the HTS, meaning it does not have further subcategories. Its distinctiveness lies in its specific chemical identity and its placement within Chapter 99, which is reserved for temporary or special tariff measures. Unlike the broad categories of live animals (Chapters 01-05) that represent distinct biological entities and general merchandise classifications, 9902.10.30 targets a very precise chemical product that is being managed under special trade legislation. The presence of this code signifies that importers must consult additional regulatory information beyond the standard chapter and heading descriptions to ensure compliance with any specific duties, quotas, or restrictions that may apply to this particular mixture.