2929.10.27.00 - N-Butylisocyanate; Cyclohexyl isocyanate; 1-Isocyanato-3-(trifluoromethyl) benzene; 1,5-Naphthalene diisocyanate; and Octadecyl isocyanate

This HTS category, 2929.10.27.00, specifically classifies a range of individual isocyanate compounds that do not fall under more broadly defined or commonly traded diisocyanates. It encompasses N-Butylisocyanate and Cyclohexyl isocyanate, which are monoisocyanates, along with 1-Isocyanato-3-(trifluoromethyl) benzene, 1,5-Naphthalene diisocyanate, and Octadecyl isocyanate. These are distinct organic chemicals characterized by the presence of one or more isocyanate (-N=C=O) functional groups.

Unlike sibling categories that group specific, high-volume diisocyanates like Toluenediisocyanates (2929.10.10.00 and 2929.10.15.00), Bitolylene diisocyanate (2929.10.20.00), and 1,6-Hexamethylene diisocyanate (2929.10.35.00), this subheading serves as a residual category for other named isocyanates. The inclusion of 1,5-Naphthalene diisocyanate, while a diisocyanate, distinguishes it from the toluidine-based varieties in the sibling entries, and its classification here indicates it is not otherwise specified or grouped.

As this is a leaf node within the HTS structure, there are no further subdivisions. Therefore, classification within 2929.10.27.00 hinges directly on the precise chemical identity of the imported substance. Importers must ensure that the isocyanate in question is one of the enumerated chemicals or falls within the implied scope of "other" isocyanates not specifically detailed in preceding subheadings under 2929.10. The presence of the isocyanate functional group is the primary defining characteristic, with the specific organic radical(s) attached determining its placement within this specific entry.