2904.10.08.00 - Benzenesulfonyl chloride

This category specifically classifies benzenesulfonyl chloride, a derivative of hydrocarbons containing only a sulfo group. It is a key intermediate in organic synthesis, primarily used in the production of dyes, pharmaceuticals, and other chemical compounds. Its structure features a benzene ring substituted with a sulfonyl chloride functional group (-SO2Cl).

Benzenesulfonyl chloride is distinguished from its siblings by its unique chemical identity. Unlike 2-anthracenesulfonic acid or m-benzenedisulfonic acid, sodium salt, it contains a single sulfo group and is not a salt or ester derivative. Furthermore, it differs from p-toluenesulfonyl chloride, which has a methyl group attached to the benzene ring in addition to the sulfonyl chloride. This specific arrangement of functional groups is crucial for its classification under this heading.

As this is a leaf node in the HTS, there are no further subdivisions. Classification under 2904.10.08.00 is definitive for benzenesulfonyl chloride itself, based on its chemical structure and composition. The "Other" designation within the sibling categories indicates that any sulfo-derivative of hydrocarbons not specifically enumerated elsewhere within the 2904.10 subheadings would fall into the general "Other" provision.