SITCSection 5

Heterocyclic Compounds with Oxygen Hetero-Atoms Only (NES)

Name: Heterocyclic Compounds with Oxygen Hetero-Atoms Only (NES) (SITC 51569) -- U.S. Import Data
Creator: U.S. Census Bureau
License: https://www.census.gov/about/policies/open-gov/open-data.html

SITC 51569Basic heading5-digit

U.S. imports · July 2026: $62.8M; YTD $437.8M

U.S. exports · July 2026: $40.3M

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U.S. imports of heterocyclic compounds with oxygen hetero-atoms only (nes) (SITC 51569) totaled $62.8M in July 2026, traded with 43 countries.

Importers of Heterocyclic Compounds with Oxygen Hetero-Atoms Only (NES) paid $3.4M in duties in July 2026 — an effective duty rate of 9.8% on $34.7M in dutiable value, based on actual customs collections rather than the published tariff schedule.

Last updated: July 2026 data

Oxygen-only heterocyclic compounds not elsewhere specified serve as key intermediates in the synthesis of agrochemicals, flavors, fragrances, and specialty polymers. The ring structures in this grouping — including furans, pyrans, and dioxanes — confer distinct reactivity profiles that make them valuable building blocks for fine chemical manufacturers. Importers should confirm correct SITC classification against related oxygen-heterocycle subheadings, as minor structural differences can shift a compound into a more specific category with different duty treatment.

AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.

774 shipments/mo

12-month trend

ImportsExports

Imports

$62.8MYoY · Pro

Exports

$40.3MYoY · Pro

12-mo low · imports

YoY · Pro

$346.0M$0

June 2025December 2025July 2026

Through July 2026. Source: U.S. Census Bureau.

Suppliers

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Basic heading 54 of 465 in section 5

Share of section 5 imports0.22%

Basic heading 51569 · $62.8M of $28.9B

Where it comes from, where it lands, what it pays

Imports · July 2026

Countries

origin

China and Ireland together supply 49% of it.

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Districts

customs district

Census does not publish district detail for this classification system.

States

destination

Census does not publish state detail for this classification system.

Ports

entry

Census does not publish port detail for this classification system.

Frequently Asked Questions

How do classifiers distinguish 'NES' oxygen heterocyclics from more specifically enumerated subheadings?

The NES (not elsewhere specified) designation applies only when the compound's ring system does not match a named category such as lactones or epoxides covered under other headings. Importers should review the full SITC and HTS schedules — and consult a licensed customs broker — to confirm that a given oxygen-heterocycle is not more precisely classifiable elsewhere.

What end-use industries are the primary buyers of oxygen-only heterocyclic compounds?

Pharmaceutical synthesis, agrochemical formulation, and flavor-and-fragrance manufacturing are the dominant end-use sectors. Furan-based and pyran-based intermediates are also used in specialty resin and polymer production.