U.S. exports of Poly(1,3-Phenylene Methylphosphonate) (HS 391120) totaled $88K in August 2026.
Poly(1,3-Phenylene Methylphosphonate) imports of $740 in August 2026 ran 99% below the year-to-date monthly average of $91K.
Last updated: August 2026 dataPoly(1,3-phenylene methylphosphonate) is a phosphorus-containing polymer used primarily as a flame-retardant additive or reactive intermediate in engineering plastics and specialty coatings. France and India are the leading US import sources, with China and Germany also supplying the market. The heading resolves to a single tariff line (3911200000), but importers sourcing from China should verify whether Section 301 measures apply to their specific product configuration, as specialty polymers in Chapter 39 have been subject to List-based tariff actions.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
1 import shipments a month
Chapter 39 specialty polymers have been included in Section 301 trade actions targeting Chinese goods. Whether a specific shipment is subject to additional duties depends on the precise product description and any applicable exclusions granted by USTR. Importers should review the current Section 301 lists and consult a licensed customs broker to confirm the duty treatment for their specific product.
The primary end uses are flame-retardant formulations for engineering plastics, wire and cable jacketing, and specialty coatings where phosphorus-based chemistry provides halogen-free fire resistance. Electronics, automotive, and construction materials manufacturers are typical downstream consumers.
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Subheading 3 of 3 in heading 3911
Subheading 391120 · $88K of $89.0M
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 3911200000 | Poly(1,3-Phenylene Methylphosphonate) | $740 | 10.00% | 100.00% | $74 |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3911200000 | Poly(1,3-Phenylene Methylphosphonate) | $88K |
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.
ImportsExports
Imports
$740YoY · free account
Exports
$88KYoY · free account
Low of 8 reported months · imports
Low · free accountOver the twelve months to August 2026, the U.S. exported $991K of Poly(1,3-Phenylene Methylphosphonate).
Fewer 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 August 2026 · imports 8 of 12 months reported, exports 10 of 12 months reported. Source: U.S. Census Bureau.
Exports · August 2026
destination
Canada and Mexico together take 91% of it.
customs district
origin
entry
rate provision · imports
duty collected equals 10.00% of imports for consumption.