2933.49.10.00 - Ethoxyquin (1,2-Dihydro-6-ethoxy-2,2,4- trimethylquinoline)

This HTS subheading, 2933.49.10.00, specifically classifies Ethoxyquin, a chemical compound identified by its systematic name 1,2-Dihydro-6-ethoxy-2,2,4-trimethylquinoline. Ethoxyquin is primarily recognized for its use as an antioxidant, particularly in animal feed to prevent the spoilage of fats and to preserve fat-soluble vitamins. Its classification within this broader chapter signifies its nature as an organic chemical.

This category is distinct from its sibling entries due to the precise chemical structure and intended application of the classified substance. For example, while 4,7-Dichloroquinoline is also a quinoline derivative, it possesses different chemical properties and typical uses. Similarly, 8-Methylquinoline and Isoquinoline are distinct compounds, and Ethyl ethyl-6,7,8-trifluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylate represents a significantly more complex quinoline derivative. This subheading's focus is therefore narrow, encompassing only Ethoxyquin and its specific chemical identity.

As this is a leaf node within the HTS, there are no further subcategories. Classification at this level requires careful identification of the chemical substance against the provided description and nomenclature. The key criterion for inclusion in this subheading is the exact chemical composition matching that of Ethoxyquin, as detailed in the description.