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SITCSection 5
U.S. imports of organo-inorganic compounds, not elsewhere specified (SITC 51550) totaled $127.2M in April 2026, traded with 39 countries.
Importers of Organo-Inorganic Compounds, Not Elsewhere Specified paid $7.8M in duties in April 2026 — an effective duty rate of 6.4% on $122.9M in dutiable value, based on actual customs collections rather than the published tariff schedule. Organo-Inorganic Compounds, Not Elsewhere Specified imports of $127.2M in April 2026 ran 28% above the year-to-date monthly average of $99.3M.
Last updated: April 2026 dataOrgano-inorganic compounds — molecules containing both carbon-based organic groups and inorganic elements such as silicon, tin, lead, or boron — serve as catalysts, stabilizers, and functional materials across the semiconductor, polymer, and specialty coatings industries. The NES designation signals that the compound does not fit a more precisely defined heading (such as organometallic compounds of specific metals), requiring importers to conduct a thorough heading-exclusion analysis before classification. Given the breadth of this category, trade professionals should pay close attention to whether specific compounds are subject to chemical safety reporting obligations under TSCA or analogous frameworks.
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Yes. The Toxic Substances Control Act (TSCA) requires that chemical substances imported into the US be listed on the TSCA Chemical Substance Inventory or qualify for an exemption. Importers must certify TSCA compliance at entry; substances not on the inventory may require a pre-manufacture notice or low-volume exemption before import.
The key criterion is the presence of a direct carbon-to-metal or carbon-to-heteroatom bond that gives the compound its organo-inorganic character, as opposed to simple inorganic salts where carbon appears only in a counterion such as carbonate. Structural analysis and, where necessary, a CBP binding ruling are the most reliable tools for resolving borderline cases.
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Monthly import values over time