9902.01.97 - Benzenesulfonyl chloride (CAS No. 98-09-9) (provided for in subheading 2904.10.08)

HTS code 9902.01.97 specifically covers Benzenesulfonyl chloride (CAS No. 98-09-9). This chemical compound is typically used as a reagent in organic synthesis, particularly for the preparation of sulfonamides and sulfonate esters. Its inclusion under Chapter 99 signifies a temporary modification or special classification provision, often related to trade agreements or specific import restrictions.

This classification is distinct from the broader categories found in Chapters 1-97 of the HTS, which deal with general merchandise. Unlike sibling categories that might encompass a wide array of live animals, or raw materials, this code focuses on a very specific, narrowly defined industrial chemical. Its presence in Section XXII indicates it is subject to special rules outside the standard tariff structure, necessitating careful attention to its specific listing and any associated proclamations or legislation.

As a leaf node within its chapter, HTS code 9902.01.97 does not have further subcategories. Therefore, classification within this code is definitive for Benzenesulfonyl chloride. Importers must ensure that the goods precisely match the chemical identity and CAS number to be correctly classified under this provision. Any deviations in chemical composition or intended use could necessitate classification under a different HTS code.