2933.34.00.00 - Other fentanyls and their derivatives

This HTS classification, 2933.34.00.00, encompasses "Other fentanyls and their derivatives." It specifically includes synthetic opioid analgesics that share a structural similarity with fentanyl but are not explicitly listed under the more specific sibling categories within heading 2933.3. This category is crucial for capturing a wide range of potent synthetic opioids that fall outside the narrowly defined entries.

Distinguishing this category from its siblings is key. For example, while 2933.33.01.00 enumerates specific fentanyl compounds and related analgesics by name (including fentanyl itself and carfentanil), this heading 2933.34.00.00 serves as a residual category for any other fentanyl derivatives not otherwise specified. It also differs from categories like 2933.35.00.00 (3-Quinuclidinol) and 2933.36.00.00 (4-Anilino-N-phenethylpiperidine (ANPP)), which represent distinct chemical structures within the broader pyridine and piperidine family, not directly derivatives of fentanyl.

As a leaf node, 2933.34.00.00 does not have further subcategories. Classification within this heading relies on the chemical structure of the substance being identified as a derivative of fentanyl, but not explicitly named or defined in the more specific sibling headings. Examples of substances that would fall here might include novel synthetic opioids designed to mimic fentanyl's effects but with minor structural modifications not covered by the specific named compounds. Careful chemical analysis and comparison to the defined structures in the parent heading are therefore essential for accurate classification.