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HSChapter 28
U.S. imports of inorganic bases, metal oxides, hydroxides & peroxides (nesoi) (HS 282590) totaled $11.3M in April 2026, traded with 21 countries.
Importers of Inorganic Bases, Metal Oxides, Hydroxides & Peroxides (NESOI) paid $1.1M in duties in April 2026 — an effective duty rate of 11% on $9.9M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataThis residual heading captures a diverse set of inorganic metal compounds not covered by more specific headings in Chapter 28, including beryllium oxide and hydroxide (2825901000), niobium oxide (2825901500), tin oxides (2825902000), tungsten oxides (2825903000), cadmium oxide (2825907500), and a broad catch-all line (2825909000) for other inorganic bases, metal oxides, and peroxides. Turkey, Brazil, and Vietnam lead US import supply across the heading, though the supplier mix varies significantly by specific compound. Correct classification within this heading requires careful identification of the metal and its oxidation state, as misclassification between the named lines and the NESOI catch-all can affect duty liability. Beryllium compounds warrant particular attention given OSHA occupational exposure regulations that apply to downstream handlers.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Classification follows a hierarchy: if the metal oxide is specifically named in one of the dedicated 10-digit lines — beryllium (2825901000), niobium (2825901500), tin (2825902000), tungsten (2825903000), or cadmium (2825907500) — it must be classified there rather than in the NESOI line (2825909000). The NESOI line is reserved for metal oxides, hydroxides, and peroxides that are not covered by any of the named subheadings. A certificate of analysis identifying the specific metal and compound form is essential.
Beryllium oxide (BeO) is not subject to a mandatory admissibility review at the port of entry in the same way as food or agricultural products, but it is a highly toxic material regulated by OSHA under the beryllium standard (29 CFR 1910.1024). Importers and downstream users must maintain appropriate safety data sheets and exposure control programs. Some end-use applications in nuclear and defense sectors may also be subject to export control or end-user certificate requirements in the country of origin.
| Country | Imports | Exports | Balance |
|---|---|---|---|
| LUXEMBOURG | -- | $50.3M | +$50.3M |
| POLAND | -- | $5.9M | +$5.9M |
| GERMANY | $273K | $5.3M | +$5.1M |
| JAPAN | $242K | $4.6M | +$4.4M |
| ISRAEL | -- | $3.8M | +$3.8M |
Monthly import values over time
Supplier Network
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HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2825909000 | OTHER INORGANIC BASES,METAL OXIDES,PEROXIDES NESOI | $4.8M | 15.64% | $792K |
| 2825903000 | TUNGSTEN OXIDES | $3.6M | 5.50% | $100K |
| 2825901500 | NIOBIUM OXIDE | $2.3M | 4.08% | $92K |
| 2825902000 | TIN OXIDES | $727K | 14.20% | $103K |
OTHER INORGANIC BASES,METAL OXIDES,PEROXIDES NESOI
TUNGSTEN OXIDES
NIOBIUM OXIDE
TIN OXIDES
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2825900002 | INORGANIC BASES; METAL OXIDES, HYDROX, PEROX NESOI | $75.9M |
INORGANIC BASES; METAL OXIDES, HYDROX, PEROX NESOI
1.7M kg
URANIUM ENRICHED IN U235 ETC. PLUTONIUM ETC.
HS 284420
NATURAL URANIUM & COMPOUNDS, ALLOYS & CERAMICS ETC
HS 284410
ANHYDROUS AMMONIA
HS 281410
ALLOYS, DISPERSIONS,ISOTOPES & COMPOUNDS NES
HS 284443
SILICON, UNDER 99.99% (BY WEIGHT) SILICON
HS 280469
PHOSPHORIC ACID AND POLYPHOSPHORIC ACIDS
HS 280920
| State | Imports | Exports | Balance |
|---|---|---|---|
| Pennsylvania | $225K | $61.7M | +$61.5M |
| South Carolina | -- | $5.6M | +$5.6M |
| Alabama | -- | $5.2M | +$5.2M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| CHESTER, PA | $663K | $52.8M | +$52.2M |
| CHARLESTON, SC | $250K | $6.3M | +$6.0M |
| NEW ORLEANS, LA | $34K | $5.3M | +$5.2M |