U.S. imports of Aromatic Polyamines & Their Derivatives and Salts (SITC 51455) totaled $18.5M in August 2026, imported from 17 countries.
Importers of Aromatic Polyamines & Their Derivatives and Salts paid $3.1M in duties in August 2026, an average duty rate of 16.86% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Aromatic Polyamines & Their Derivatives and Salts imports of $18.5M in August 2026 ran 10% above the year-to-date monthly average of $16.8M.
Last updated: August 2026 dataAromatic polyamines — compounds with two or more amine groups attached to aromatic ring systems — are critical intermediates for high-performance polymers, including polyurethanes (via MDA/MDI pathways), aramid fibers, and epoxy hardeners used in aerospace and construction composites. Diaminodiphenylmethane (MDA) and phenylenediamines are among the most commercially significant members. Several aromatic polyamines are subject to occupational health and environmental scrutiny under EPA regulations, and some are listed as potential carcinogens, which can affect import documentation and downstream handling requirements.
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257 import shipments a month
Yes. Several aromatic polyamines, including certain diaminodiphenyl compounds, are regulated under EPA's Toxic Substances Control Act (TSCA) and may require pre-manufacture or significant new use notifications. OSHA also sets permissible exposure limits for some members of this class. Importers should verify TSCA compliance and SDS requirements before entry.
The number of amine functional groups on the aromatic system is the defining criterion: one amine group places a compound in the monoamine heading, while two or more amine groups — regardless of whether they are on the same or different rings — place it in the polyamine heading. Compounds like 4,4'-methylenedianiline (MDA) with two amine groups on separate phenyl rings are classic polyamines.
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Basic heading 189 of 465 in section 5
Basic heading 51455 · $18.5M of $27.5B
Imports · August 2026
origin
Belgium and India together supply 50% of it. China pays 42.8% duty; Belgium 9.7%.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$18.5MYoY · free account
Exports
$4.5MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $190.2M of Aromatic Polyamines & Their Derivatives and Salts and exported $48.7M.
Through August 2026. Source: U.S. Census Bureau.