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HSChapter 29
U.S. imports of other perfluorooctane sulfonamides (nesoi) (HS 293550) totaled $7K in June 2026, traded with 2 countries.
Other Perfluorooctane Sulfonamides (NESOI) imports of $7K in June 2026 ran 93% below the year-to-date monthly average of $104K.
Serving as the residual provision for perfluorooctane sulfonamide compounds not enumerated in headings 293510 through 293540, this NESOI heading captures less common PFAS sulfonamide variants under tariff line 2935500000. India and Japan are the leading documented US suppliers, with the Netherlands also a source. Importers must confirm that a compound genuinely falls outside the four specifically enumerated headings before using this residual classification, as misclassification among the PFAS sulfonamide series is a recurring audit issue.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
The four preceding headings (293510–293540) each cover a named N-substituent combination: N-methyl, N-ethyl, N-ethyl-N-(2-hydroxyethyl), and N-(2-hydroxyethyl)-N-methyl. Any perfluorooctane sulfonamide with a different substituent pattern — such as a diethyl or N-propyl variant — would fall into this NESOI provision. A structural analysis confirming the substituents is the essential classification document.
Generally yes — EPA's TSCA Significant New Use Rules for PFOS-related substances are defined by the perfluorooctane sulfonate/sulfonamide chemical family, not by the specific N-substituent. Importers of any compound in this series should review current SNUR coverage and consult EPA guidance or legal counsel before importation.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| CANADA | -- | $30K | +$30K |
| MEXICO | -- | $10K | +$10K |
| CHINA | $7K | -- | -$7K |
| KOREA, SOUTH | -- | -- | -- |
| INDIA | -- | -- | -- |
Monthly import values over time
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share |
|---|---|---|---|---|
| 2935500000 | OTHER PERFLUOROOCTANE SULFONAMIDES | $7K | 0.00% | 0.00% |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2935500000 | OTHER PERFLUOROOCTANE SULFONAMIDES | $40K |
NUCLEIC ACIDS & SALTS; OTHER HETEROCYCLIC CMP, NES
HS 293499
POLYPEPTIDE PROTEIN& GLYCOPROTEIN HORMONES &DERIV
HS 293719
CMPDS CONT AN UNFUSED PYRIDINE RING ETC NESOI
HS 293339
BENZENE
HS 290220
HETEROCYCLIC COMP W NITROGEN HETERO-ATM ONLY NESOI
HS 293399
HETEROCYCLIC COMP WITH UNFUSED PYRAZOLE RING NESOI
HS 293319
| State | Imports | Exports | Balance |
|---|---|---|---|
| California | -- | $30K | +$30K |
| Ohio | -- | $10K | +$10K |
| Kentucky | $7K | -- | -$7K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| PORT HURON, MI | -- | $30K | +$30K |
| LAREDO, TX | -- | $10K | +$10K |
| CLEVELAND, OH | $7K | -- | -$7K |