Acyclic Aldehydes Without Other Oxygen Function (Other)

Citral — whether derived from lemongrass oil fractionation or produced synthetically — classifies under 2912191000 based on its chemical identity as a mixture of geranial and neral isomers. HTS classification does not distinguish natural from synthetic origin for this compound, though FDA flavor regulations and labeling rules do make that distinction relevant for downstream food and cosmetic applications.

Glyoxal (2912193000) is a dialdehyde used primarily as a crosslinking agent in textile finishing, paper treatment, and leather processing — end-uses quite different from the fragrance and flavor applications of citral or isobutanal. Because glyoxal is typically imported as an aqueous solution, importers should confirm that the solution concentration and primary constituent support classification under this aldehyde heading rather than as a mixture under a different chapter.