Hydrogen Cyanide Gas (99% Purity)
Hydrogen cyanide (HCN) is a highly toxic, colorless gas or volatile liquid used primarily in chemical synthesis for producing adiponitrile and methionine. It falls under HTS 2811.12.00.00 as it is explicitly listed as hydrocyanic acid, a simple cyanogen acid per Chapter 28 Note 2(a). This chemically defined inorganic compound is supplied in pressurized cylinders for industrial applications.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing metal derivatives like copper phosphide
Complex cyanides or cyanogen compounds with metals fall under heading 2853 per Chapter Note 2(e), shifting from pure HCN.
If supplied as fluorine-containing dopant for electronics in unworked form
Chemically doped nonmetal elements for electronics remain in Chapter 28 per Chapter Note, but pure HCN doesn't qualify as doped.
If mixed with organic stabilizers or put up in retail packaging
Mixtures not chemically defined or retail preparations of chemicals fall under 3824, excluding pure compounds of heading 2811.
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Import Tips & Compliance
• Obtain EPA TSCA registration and DOT hazardous material shipping certification prior to import
• Provide detailed safety data sheets (SDS) and proof of neutralization capabilities at destination
• Avoid common pitfalls like inadequate UN-approved cylinder labeling which can lead to shipment rejection
Related Products under HTS 2811.12.00.00
Hydrocyanic Acid Aqueous Solution (10% HCN)
An aqueous solution of hydrogen cyanide stabilized at 10% concentration for safer handling in industrial fumigation and chemical processes. Classified under HTS 2811.12.00.00 as hydrocyanic acid, meeting the definition of chemically defined inorganic acids of nonmetals. The solution retains the chemical identity of HCN despite water dilution.
Anhydrous Hydrogen Cyanide (Industrial Grade)
Pure anhydrous HCN liquid/gas for large-scale production of nylon precursors and pharmaceuticals, supplied in refrigerated tankers. It is explicitly covered by HTS 2811.12.00.00 as hydrogen cyanide, a key inorganic oxygen compound of nonmetals listed in Chapter Note 2(a). High purity (99.5%+) distinguishes it for chemical synthesis.
Stabilized Hydrocyanic Acid for Fumigation (5% Solution)
Phosphine-stabilized 5% HCN aqueous solution packaged for agricultural fumigation of soil and structures. Falls under HTS 2811.12.00.00 as chemically defined hydrogen cyanide despite stabilization, as inorganic per Chapter 28 definitions. Supplied in 55-gallon drums for professional pest control.
High-Purity HCN for Adiponitrile Production
Ultra-pure hydrogen cyanide (99.9%) distilled for electrohydrodimerization to adiponitrile in nylon-6,6 manufacturing. Classified precisely under HTS 2811.12.00.00 as the simple cyanogen acid HCN per Chapter Note 2(a). Delivered via insulated stainless steel tankers.
HCN Laboratory Reagent Grade
Small-quantity reagent grade hydrogen cyanide in stabilized ampoules for analytical chemistry and organic synthesis research. HTS 2811.12.00.00 applies as chemically defined hydrocyanic acid for lab use. Packaged under 1 liter per UN-approved container.