2912.49.90.00 - Other

This HTS classification, 2912.49.90.00, encompasses "Other" aldehyde-alcohols, aldehyde-ethers, aldehyde-phenols, and aldehydes with other oxygen functions. Essentially, it serves as a residual category for compounds that possess an aldehyde functional group in combination with at least one other oxygen-containing functional group (such as hydroxyl, ether, or phenolic groups), but do not fit into more specific subcategories. The key defining characteristic is the presence of the aldehyde group alongside another oxygen function.

This category is distinguished from its sibling, "Aldehyde-alcohols" (2912.41), by its broader scope. While "Aldehyde-alcohols" specifically covers compounds with both aldehyde and alcohol functionalities, this "Other" category includes compounds where the additional oxygen function is an ether or a phenol, or indeed, multiple other oxygen functions beyond a simple alcohol. The intent is to capture complex molecules where the aldehyde character is present but is not the sole or primary oxygen-containing feature being classified.

As this is a leaf node, there are no further subcategories within 2912.49.90.00. Therefore, the focus for classification within this code is on the precise chemical structure and the presence of the aldehyde group in conjunction with any other oxygen-containing functional groups that do not align with more narrowly defined categories. This may include complex polyfunctional organic compounds where the aldehyde moiety is one of several reactive sites.