2903.91 - Chlorobenzene, o-dichlorobenzene and p-dichlorobenzene:

This HTS category, 2903.91, encompasses specific chlorinated aromatic hydrocarbons: chlorobenzene, ortho-dichlorobenzene (o-dichlorobenzene), and para-dichlorobenzene (p-dichlorobenzene). These compounds are derived from benzene by the substitution of hydrogen atoms with chlorine atoms. Chlorobenzene serves as an industrial solvent and intermediate in the production of various chemicals, including dyes and pesticides. Dichlorobenzenes, both ortho and para isomers, are also utilized as solvents, deodorizers, and intermediates in chemical synthesis.

It is important to distinguish this category from its siblings. Unlike 2903.92.00.00, which specifically covers hexachlorobenzene and DDT, or 2903.93.00.00 and 2903.94.00.00 for pentachlorobenzene and hexabromobiphenyls respectively, 2903.91 focuses on mono- and di-chlorinated benzenes. The "Other" category, 2903.99, would be reserved for any halogenated derivatives of aromatic hydrocarbons not specifically enumerated under the preceding subheadings.

Within the 2903.91 classification, further subdivisions are provided to differentiate between the individual compounds. Subcategory 2903.91.10.00 is dedicated to chlorobenzene, while 2903.91.20.00 is for ortho-dichlorobenzene, and 2903.91.30.00 is for para-dichlorobenzene. These distinctions are critical for accurate tariff application, as they reflect specific chemical identities and potential variations in commercial uses or regulatory treatments.