2912.29.30.00 - 3,4-Dimethylbenzaldehyde; Paraldehyde, USP grade; andp-Tolualdehyde

This HTS classification, 2912.29.30.00, specifically covers certain aromatic aldehydes that do not possess other oxygen functional groups. The included items are 3,4-Dimethylbenzaldehyde, which is an aromatic aldehyde with two methyl substituents on the benzene ring, and p-Tolualdehyde, another aromatic aldehyde characterized by a methyl group at the para position of the benzene ring. Additionally, Paraldehyde, when supplied in USP (United States Pharmacopeia) grade, falls under this heading. These substances are distinguished by their cyclic aldehyde structure and lack of further oxygen-containing functional groups beyond the aldehyde itself.

The distinction between this category and its sibling, 2912.29.10.00, lies in the specific chemical structure of the covered aldehydes. While both fall under "Cyclic aldehydes without other oxygen function," this particular subheading is for aromatic aldehydes other than phenylacetaldehyde. Phenylacetaldehyde, classified under 2912.29.10.00, is a distinct chemical compound with a phenyl group attached to a two-carbon chain terminating in an aldehyde group, whereas the substances here are direct derivatives of benzene rings with an aldehyde functional group. The broader sibling category, 2912.29.60, serves as a catch-all for other cyclic aldehydes without other oxygen function that do not fit into the more specific subheadings.

As 2912.29.30.00 represents a leaf node within the HTS structure, there are no further subcategories to introduce. Classification into this specific subheading relies on the accurate identification of the chemical substance as one of the named aldehydes or Paraldehyde of USP grade, confirming it is a cyclic aldehyde without additional oxygen functionalities. This ensures precise customs treatment for these distinct organic chemical compounds.