2912.29 - Other:

This category, HTS 2912.29, encompasses cyclic aldehydes that do not possess any other oxygen-containing functional groups, excluding those specifically enumerated under sibling categories. It forms a distinct group within the broader classification of aldehydes and their derivatives.

This "Other" category serves as a residual classification for cyclic aldehydes that do not meet the specific criteria of other subheadings within 2912.2. For instance, it is distinct from HTS 2912.21, which is exclusively for benzaldehyde, a common aromatic aldehyde.

The subcategories under 2912.29 further refine the classification of these remaining cyclic aldehydes. HTS 2912.29.10.00 specifically covers phenylacetaldehyde, while 2912.29.30.00 groups together 3,4-dimethylbenzaldehyde, paraldehyde (USP grade), and p-tolualdehyde. The residual subheading, 2912.29.60, applies to all other cyclic aldehydes not otherwise specified.