2909.19 - Other:

This category, HTS Code 2909.19, encompasses acyclic ethers and their halogenated, sulfonated, nitrated, or nitrosated derivatives that are not specifically enumerated elsewhere within the 2909.1 heading. It serves as a residual category for a diverse range of acyclic ether compounds. This classification applies to ethers formed by the linkage of two alkyl or alkenyl groups through an oxygen atom, excluding those with more complex ether linkages or functional groups that would place them in other headings.

Distinguishing 2909.19 from its sibling category, 2909.11.00.00 (Diethyl ether), is crucial for accurate classification. While diethyl ether is a specific, commonly recognized acyclic ether, 2909.19 covers all other acyclic ethers, including those with longer alkyl chains, branched chains, or unsaturation, as well as derivatives where halogen, sulfonyl, nitro, or nitroso groups have been substituted onto the ether structure. The defining characteristic is the acyclic nature of the ether linkage and the absence of other primary functional groups that would warrant classification elsewhere.

The subcategories within 2909.19 further refine the classification based on the nature of the alcohol from which the ether is derived. "Ethers of monohydric alcohols" will include compounds where the ether linkage is formed from an alcohol containing a single hydroxyl group. Conversely, "Ethers of polyhydric alcohols" will encompass ethers derived from alcohols possessing multiple hydroxyl groups, where at least one such alcohol contributes to the ether linkage. This distinction aids in identifying the precursor alcohols and thereby the specific structure of the ether compound.