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Harmonized System
U.S. exports of other salts of perfluorooctane sulfonic acid (HS 290435) totaled $171K in July 2026, traded with 2 countries.
Last updated: July 2026 dataBeyond the lithium and potassium forms, the remaining PFOS salts — ammonium, diethanolammonium, and others — are consolidated under a single US tariff line (2904350000). China and Norway are the leading sources of these materials, reflecting both legacy chemical manufacturing capacity and specialty production for niche industrial applications. Like all PFOS-related substances, these salts are subject to EPA TSCA oversight and may face import restrictions tied to persistent organic pollutant frameworks.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
All other salts of perfluorooctane sulfonic acid not separately enumerated enter under tariff line 2904350000. Goods of Chinese origin in this heading are subject to Section 301 tariffs; Norwegian-origin goods are not subject to Section 301 but should be assessed for any applicable MFN duty.
China's large-scale fluorochemical manufacturing base makes it a volume supplier of PFOS salts broadly, while Norway's presence reflects specialized industrial chemistry capacity, historically linked to electrochemical and specialty surfactant production. Supply concentration in these two countries creates meaningful origin-diversification risk given the evolving regulatory environment around PFAS substances.
HSChapter 29
Subheading 9 of 10 in heading 2904
Subheading 290435 · $0 of $10.1M
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ImportsExports
Imports
$0YoY · Pro
Exports
$171KYoY · Pro
12-mo low · imports
YoY · ProFewer than 6 of the last 12 months reported trade above $500K; the trend chart is not shown for thin series.
Through July 2026. Source: U.S. Census Bureau.
Exports · July 2026
destination
Canada and United Kingdom together take 100% of it.
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origin
entry
rate provision · imports
None recorded for this period.
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 |
|---|---|---|---|---|
| 2904350000 | Other Salts of Perfluorooctane Sulfonic Acid | $0 | -- | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2904350000 | Other Salts of Perfluorooctane Sulfonic Acid | $171K |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.