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HSChapter 28
U.S. exports of hydrogen cyanide (hydrocyanic acid) (HS 281112) totaled $12K in June 2026, traded with 3 countries.
Hydrogen cyanide (HCN), also known as hydrocyanic acid or prussic acid, is an acutely toxic gas or liquid used as a chemical intermediate in the production of adiponitrile, methyl methacrylate, and chelating agents such as EDTA. Its extreme toxicity places it among the most tightly controlled industrial chemicals in international trade, with DOT Poison Inhalation Hazard classification, EPA EPCRA Extremely Hazardous Substance designation, and potential Chemical Weapons Convention (CWC) precursor reporting obligations. The heading resolves to a single 10-digit line (2811120000). Given the hazard profile, most US consumption is produced domestically or under closely managed supply agreements rather than through spot import channels.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
HCN is listed as a Schedule 3 chemical under the Chemical Weapons Convention, which means imports above certain thresholds may be subject to declaration and reporting requirements administered through the Commerce Department. Importers should consult with legal counsel and a licensed customs broker to confirm current CWC reporting obligations and any applicable export-control considerations from the country of origin.
Hydrogen cyanide is classified as a DOT Poison Inhalation Hazard (PIH), Zone A — the most stringent hazmat category — requiring pressure-rated cylinders or specialized tank cars, specific placarding, and emergency response information. Ocean shipments are subject to IMDG Code requirements. Port authorities and carriers impose additional handling restrictions, making pre-arrival coordination with the port essential.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| MEXICO | -- | $12K | +$12K |
| SURINAME | -- | -- | -- |
| CZECH REPUBLIC | -- | -- | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2811120000 | HYDROGEN CYANIDE | $12K |
URANIUM ENRICHED IN U235 ETC. PLUTONIUM ETC.
HS 284420
ANHYDROUS AMMONIA
HS 281410
NATURAL URANIUM & COMPOUNDS, ALLOYS & CERAMICS ETC
HS 284410
TUNGSTATES (WOLFRAMATES)
HS 284180
ALLOYS, DISPERSIONS,ISOTOPES & COMPOUNDS NES
HS 284443
ALUMINUM OXIDE, EXCEPT ARTIFICIAL CORUNDUM, NESOI
HS 281820
| Port | Imports | Exports | Balance |
|---|---|---|---|
| LAREDO, TX | -- | $12K | +$12K |
| CHARLESTON, SC | -- | -- | -- |
| OTAY MESA, CA | -- | -- | -- |