2932.19 - Other:

This HTS category, 2932.19, encompasses heterocyclic compounds that contain at least one oxygen hetero-atom and feature an unfused furan ring within their molecular structure. Importantly, this classification applies to compounds where the furan ring is present but is not fused with other ring systems. The "Other" designation signifies that this category captures those furan compounds not specifically enumerated in preceding sibling codes.

Distinguishing 2932.19 from its siblings, such as Tetrahydrofuran (2932.11), 2-Furaldehyde (2932.12), Furfuryl alcohol and tetrahydrofurfuryl alcohol (2932.13), and Sucralose (2932.14), is crucial. Those sibling codes are reserved for specific, named furan derivatives with distinct chemical structures and common applications. This category, 2932.19, serves as a residual classification for all other qualifying unfused furan compounds that do not fit these more precise definitions.

The subcategories within 2932.19 further refine the classification based on the aromaticity of the furan ring. Subcategory 2932.19.10.00 is designated for aromatic compounds featuring the unfused furan ring, while 2932.19.51.00 covers all other non-aromatic or unspecified furan compounds. This distinction is important for understanding the chemical properties and potential uses of the classified substances.