2909.44.01.50 - Other

This HTS category, 2909.44.01.50, encompasses "Other" monoalkyl ethers of ethylene glycol or diethylene glycol. These are chemical compounds characterized by the presence of an ether linkage where one of the alkyl groups is derived from ethylene glycol or diethylene glycol, and the other alkyl group is not a methyl group. This classification serves as a residual category for compounds that meet the broader definition of ether-alcohols within Chapter 29 but do not fall into more specific subcategories.

This category is distinguished from its sibling, 2909.44.01.10, by the nature of the alkyl group attached to the oxygen atom of the ether linkage. While 2909.44.01.10 specifically covers monomethyl ethers, this residual category includes all other monoalkyl ethers where the alkyl group is not methyl. Examples could include monoethyl ethers or monopropyl ethers of ethylene glycol or diethylene glycol.

As this is a leaf node within the HTS structure, there are no further subcategories. Therefore, the focus for classification under 2909.44.01.50 is on confirming that the substance is indeed a monoalkyl ether of ethylene glycol or diethylene glycol and that the alkyl group is other than methyl. Classification relies on the precise chemical structure and the exclusion from more specific provisions within the ethers and ether-alcohols heading.