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HSChapter 28
U.S. imports of inorganic acids, nesoi (HS 281119) totaled $4.3M in April 2026, traded with 17 countries.
Importers of Inorganic Acids, NESOI paid $850K in duties in April 2026 — an effective duty rate of 20% on $4.3M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataClassified as a catch-all for inorganic acids not covered by more specific headings, this subheading encompasses commercially distinct products including arsenic acid (2811191000), hydrobromic acid (2811193000), and sulfamic acid (2811196110), alongside a general NESOI line (2811196190). China is the leading supplier, particularly for sulfamic acid used in descaling and cleaning applications, while Germany and Malaysia serve as sources for specialty acid grades. The breadth of chemistries under this heading means classification disputes are common — importers should verify that their product is not more specifically provided for elsewhere in Chapter 28 before defaulting to an NESOI line.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Chapter 28 follows a specificity hierarchy — named acids with dedicated headings (hydrochloric acid at 280610, hydrofluoric acid at 281111, etc.) must be classified there rather than in the NESOI provision. An importer should first check whether the acid has a dedicated 6-digit heading or subheading in Chapter 28. Only acids with no specific provision — such as hydrobromic acid, sulfamic acid, or arsenic acid — fall to 281119. A licensed customs broker or binding ruling from CBP can resolve ambiguous cases.
Arsenic acid (2811191000) is subject to EPA TSCA import reporting requirements and may trigger additional scrutiny under EPA's Toxic Substances Control Act given arsenic's classification as a hazardous substance. Importers should file the required TSCA certification at entry and verify whether the intended use triggers any EPA or state-level restrictions on arsenic-containing compounds.
| Country | Imports | Exports | Balance |
|---|---|---|---|
| CHINA | $1.2M | $432K | -$812K |
| KOREA, SOUTH | $619K | $330K | -$289K |
| MALAYSIA | $871K | -- | -$871K |
| GERMANY | $759K | $107K | -$652K |
| CANADA | $189K | $389K | +$200K |
Supplier Network
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Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2811196190 | INORGANIC ACIDS, NESOI | $2.2M | 29.97% | $684K |
| 2811191000 | ARSENIC ACID | $871K | 2.30% | $20K |
| 2811193000 | HYDROBROMIC ACID | $804K | 10.00% | $71K |
| 2811196110 | SULFAMIC ACID | $466K | 16.17% | $75K |
INORGANIC ACIDS, NESOI
ARSENIC ACID
HYDROBROMIC ACID
SULFAMIC ACID
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2811190002 | ACIDS, INORGANIC, NESOI | $2.4M |
ACIDS, INORGANIC, NESOI
943.5K 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
| Port | Imports | Exports | Balance |
|---|---|---|---|
| SAVANNAH, GA | $2.6M | $267K | -$2.3M |
| HOUSTON, TX | $797K | $284K | -$514K |
| LOS ANGELES, CA | $66K | $489K | +$423K |