2909.50.50.00 - Other

This HTS classification, 2909.50.50.00, designates "Other" ether-phenols, ether-alcohol-phenols, and their derivatives. It encompasses compounds within this broad family that do not fall under more specific, preceding subheadings. These materials are characterized by the presence of both an ether linkage (an oxygen atom bonded to two alkyl or aryl groups) and a phenolic hydroxyl group, or an alcohol hydroxyl group in addition to both. The "other" designation signifies that the specific chemical structure or intended use does not align with narrowly defined categories, requiring classification based on its general chemical properties and exclusion from more particular headings within this group.

Distinguishing this category from its sibling, 2909.50.45.00, is crucial. While both fall under the umbrella of ether-phenols and their derivatives, 2909.50.45.00 is specifically reserved for products described in additional U.S. note 3 to section VI. This implies that 2909.50.50.00 covers all other ether-phenols and ether-alcohol-phenols that do not meet the criteria stipulated in that particular note, focusing on their intrinsic chemical makeup rather than any specific regulatory or trade-related designation outlined elsewhere.

As this is a leaf node, there are no further subcategories. Therefore, classification into 2909.50.50.00 relies on a thorough analysis of the chemical compound's structure to ensure it meets the broad definition of an ether-phenol or ether-alcohol-phenol and is not specifically covered by any more granular tariff provisions. The absence of children means that the classification decision is final at this level, necessitating careful examination of the chemical properties and comparison against the scope of the parent heading and any relevant U.S. notes or explanatory notes.