Structurally defined by a methyl group and a 2-hydroxyethyl group on the sulfonamide nitrogen, this perfluorooctane sulfonamide variant is enumerated at HS6 heading 293540, separate from the N-methyl and N-ethyl forms. Germany is the leading documented US supplier. As with all PFOS-related compounds, EPA's TSCA framework — including applicable Significant New Use Rules — governs import and use, and importers should confirm current regulatory status before shipment.
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The sole structural difference is the methyl versus ethyl group on the nitrogen. Historically, both served as fluorosurfactant intermediates, but their distinct structures can affect reactivity and end-product performance. For customs purposes, a certificate of analysis confirming the methyl substituent is the key document separating classification under 293540 from 293530.
Based on available schedule data, no 10-digit children lines are enumerated for this heading. The heading is treated as a single undivided provision, meaning all qualifying imports are reported under the HS6 code without further US-specific subdivision.
Subheading 6 of 6 in heading 2935
Trade Directory
List your company under HS 293540 — N-(2-Hydroxyethyl)-N-Methyl Perfluorooctane Sulfonamide, so the companies trading it can find you. Be the first supplier listed.
ImportsExports
Imports
—YoY · free account
Exports
—YoY · free account
Low of 1 reported month · imports
Low · free accountFewer than 6 of the last 12 months reported trade, or the latest month was under $500K; the trend chart is not shown for thin series.
Through December 2025 · imports 1 of 12 months reported, exports 1 of 12 months reported. Source: U.S. Census Bureau.
Imports · December 2025
origin
customs district
None recorded for this period.
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entry
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rate provision · imports
None recorded for this period.