2903.91.30.00 - p-Dichlorobenzene

This HTS category, 2903.91.30.00, specifically classifies p-dichlorobenzene, also known as para-dichlorobenzene. This is an aromatic hydrocarbon derivative where two chlorine atoms are substituted onto a benzene ring at positions 1 and 4 (para position). It is a crystalline solid with a characteristic odor and is commonly used as a fumigant, deodorant, and in the manufacturing of dyes and other organic compounds.

This classification is distinct from its siblings, chlorobenzene (2903.91.10.00) and o-dichlorobenzene (2903.91.20.00). Chlorobenzene has only one chlorine atom attached to the benzene ring, while o-dichlorobenzene features two chlorine atoms in adjacent positions (ortho position). The specific para-substitution pattern of chlorine atoms on the benzene ring is the defining characteristic for inclusion in this particular sub-heading.

As this is a leaf node within the HTS structure, there are no further subdivisions. Classification under 2903.91.30.00 is definitive for pure p-dichlorobenzene and mixtures where it is the principal component. Careful consideration of the molecular structure and isomerism is paramount for accurate classification, ensuring that only p-dichlorobenzene is correctly assigned to this code.