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HSChapter 28
U.S. imports of inorganic oxygen compounds of nonmetals (nesoi) (HS 281129) totaled $5.4M in July 2026, traded with 24 countries.
Importers of Inorganic Oxygen Compounds of Nonmetals (NESOI) paid $809K in duties in July 2026 — an effective duty rate of 16% on $5.0M in dutiable value, based on actual customs collections rather than the published tariff schedule. Inorganic Oxygen Compounds of Nonmetals (NESOI) imports of $5.4M in July 2026 ran 25% above the year-to-date monthly average of $4.3M.
Last updated: July 2026 dataA residual catch-all heading for nonmetal oxides not classified elsewhere, this group spans chemically and commercially diverse substances: arsenic trioxide (2811291000), selenium dioxide (2811292000), sulfur dioxide (2811293000), and other compounds (2811295000 and 2811299000), each with distinct industrial end-uses ranging from glass manufacturing to pharmaceutical synthesis. Austria leads US imports under this heading, followed by China and Canada — a supplier mix that reflects specialty chemical production in Europe alongside high-volume Chinese output. Correct subheading selection depends on precise chemical identity, making supplier certificates of analysis essential documentation at entry.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
196 shipments/mo
Arsenic trioxide (2811291000) is a toxic substance and may be subject to EPA Toxic Substances Control Act (TSCA) reporting requirements, as well as hazardous materials transport regulations. Importers should confirm TSCA compliance and consult a licensed customs broker familiar with chemical import requirements before shipment.
A supplier-issued certificate of analysis identifying the precise chemical compound (CAS number, molecular formula, and purity) is the primary classification evidence. Without it, CBP may challenge the declared subheading, particularly when distinguishing between the specific named compounds and the broader NESOI lines.
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Subheading 3 of 6 in heading 2811
Subheading 281129 · $5.4M of $47.2M
ImportsExports
Imports
$5.4MYoY · Pro
Exports
$2.9MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 2811295000 | Other Inorganic Oxygen Compounds of Nonmetals | $5.2M | 15.03% | 92.88% | $775K |
| 2811293000 | Sulfur Dioxide | $164K | 6.07% | 51.57% | $10K |
| 2811291000 | Arsenic Trioxide | $64K | 29.91% | 100.00% | $19K |
| 2811292000 | Selenium Dioxide | $0 | -- | -- | $5K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2811299000 | Inorganic Oxygen Compounds of Nonmetals, NESOI | $2.9M |
| 2811293000 | Sulfur Dioxide | $36K |
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.
Imports · July 2026
origin
Austria and India together supply 60% of it.
customs district
destination
entry
rate provision · imports
7.1% enters free of duty; the effective duty rate is 15.02%.