Harmonized System
U.S. imports of Ammonia in Aqueous Solution (HS 281420) totaled $587K in August 2026, imported from 8 countries.
Last updated: August 2026 dataAqueous ammonia — commonly traded as ammonium hydroxide — serves as a critical industrial input for fertilizer production, water treatment, refrigeration systems, and chemical synthesis, and the entire heading resolves to a single 10-digit line (2814200000). Canada is the leading supplier, benefiting from geographic proximity and integrated North American chemical supply chains, with Taiwan, Japan, Belgium, and Germany also contributing. Concentration levels and intended end use drive regulatory classification: high-purity grades destined for semiconductor fabrication face different handling and documentation requirements than agricultural or industrial grades. Importers should confirm whether shipments meet DOT hazardous-materials transport standards, as aqueous ammonia is regulated as a corrosive and toxic substance in transit.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
91 import shipments a month
At the HS6 level, heading 281420 covers all aqueous ammonia regardless of concentration, and the single US 10-digit line 2814200000 does not subdivide by concentration. However, concentration is critical for DOT hazmat classification, shipping documentation, and end-use regulatory compliance, so it must be declared accurately on the bill of lading and safety data sheet.
Importers generally need a commercial invoice, packing list, bill of lading, and a Safety Data Sheet (SDS) meeting OSHA HazCom standards. Because aqueous ammonia is a DOT-regulated hazardous material, proper UN number labeling, emergency response information, and carrier certification are also required. High-purity electronic-grade ammonia may additionally require a certificate of analysis specifying trace-metal and moisture content.
Subheading 2 of 2 in heading 2814
Subheading 281420 · $587K of $92.5M
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HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share |
|---|---|---|---|---|
| 2814200000 | Ammonia in Aqueous Solution | $587K | 0.00% | 0.00% |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2814200000 | Ammonia in Aqueous Solution | $449K |
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.
ImportsExports
Imports
$587KYoY · free account
Exports
$449KYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $7.2M of Ammonia in Aqueous Solution and exported $8.5M.
Through August 2026. Source: U.S. Census Bureau.
Imports · August 2026
origin
Canada and Japan together supply 95% of it.
customs district
entry
rate provision · imports
100.0% enters free of duty; duty collected equals 0.00% of imports for consumption.