Subheading 21 of 27 in heading 2933
Introduced as a standalone HS subheading to sharpen international monitoring of fentanyl analogs not captured elsewhere, this heading covers fentanyl structural variants that incorporate an unfused pyrazole ring — a chemical feature associated with novel synthetic opioids. All imports enter under 2933340000 and require DEA Schedule I or II import authorization depending on the specific analog's scheduling status. Spain leads US supply, followed by Canada and Switzerland, a supplier profile consistent with licensed pharmaceutical manufacturers producing small volumes for research or clinical use.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Heading 293333 covers fentanyl itself (by INN name) along with a specific enumerated list of other controlled substances. Heading 293334 captures fentanyl structural analogs and derivatives that contain an unfused pyrazole ring and are not otherwise classified — essentially a residual category for novel fentanyl-type compounds. If a compound is named in 293333, it classifies there; if it is a pyrazole-ring fentanyl derivative not so named, 293334 applies.
Even research-quantity imports require a DEA importer registration, a Schedule I or II import permit (DEA Form 161), and FDA documentation if the material is intended for clinical or investigational use. The small commercial volume of this heading's trade — primarily from licensed pharmaceutical manufacturers in Spain, Canada, and Switzerland — reflects the stringent authorization requirements that limit this market to a narrow set of registered importers. Consult DEA-registered counsel before any import attempt.
Trade Directory
List your company under HS 293334 — Fentanyls and Derivatives Containing an Unfused Pyrazole Ring (NESOI), so the companies trading it can find you. Be the first supplier listed.
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2933340000 | Fentanyls & Deriv Cont Unfused Pyrazole Ring NESOI | $5K |
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Through December 2025 · imports 3 of 12 months reported, exports 1 of 12 months reported. Source: U.S. Census Bureau.
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