2912.19.25.00 - Butanal (Butyraldehyde, normal isomer)

This HTS category, 2912.19.25.00, specifically covers butanal, also known as butyraldehyde in its normal isomer form. Butanal is a primary aldehyde with a four-carbon chain and a characteristic pungent odor. It is a significant industrial chemical, frequently utilized as an intermediate in the synthesis of other organic compounds, including alcohols, acids, and plastics, and finds applications in the production of perfumes and flavorings.

Within its sibling categories at this level, 2912.19.30.00 covers glyoxal, which is a dialdehyde with two aldehyde groups. Isobutanal, classified under 2912.19.40.00, is an isomer of butanal but differs in its branched carbon chain structure. The "Other" category at 2912.19.50.00 serves as a residual category for acyclic aldehydes without other oxygen function that do not fit the more specific descriptions.

As a leaf node, 2912.19.25.00 represents a precise classification for normal butanal. When classifying goods under this HTS code, attention should be paid to the chemical structure and purity of the substance, ensuring it aligns with the definition of butanal (normal isomer) and does not possess additional oxygen-containing functional groups that would place it in a different chapter or heading. The primary determinant for classification here is the presence of a single aldehyde group on a four-carbon, unbranched chain.