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HSChapter 28
U.S. imports of nitrates, not elsewhere specified or included (HS 283429) totaled $1.6M in April 2026, traded with 21 countries.
Importers of Nitrates, Not Elsewhere Specified or Included paid $223K in duties in April 2026 — an effective duty rate of 14% on $1.6M in dutiable value, based on actual customs collections rather than the published tariff schedule. Nitrates, Not Elsewhere Specified or Included imports of $1.6M in April 2026 ran 29% below the year-to-date monthly average of $2.3M.
Last updated: April 2026 dataCalcium nitrate—widely used as a nitrogen-calcium fertilizer and concrete accelerator—is the commercially dominant product in this residual nitrates heading, alongside bismuth, strontium, and other specialty nitrates. Norway leads US imports, reflecting that country's large-scale calcium nitrate production capacity, with Spain and China also significant sources. The heading spans five 10-digit lines including bismuth nitrates (2834290500), calcium nitrates (2834291000), and strontium nitrates (2834292000), so precise chemical identification is essential for correct line selection.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Pure calcium nitrate is classified under 2834291000. Calcium-ammonium nitrate blends, however, may fall under a different heading depending on their composition and whether they are formulated as fertilizers—potentially in Chapter 31. A licensed customs broker should be consulted to determine the correct classification based on the product's exact chemical specification.
Strontium nitrate (2834292000) is enumerated separately because of its specific use as a red-flame colorant in pyrotechnics and signal flares, distinguishing it from fertilizer or industrial nitrates. Importers of strontium nitrate should also be aware of ATF and state-level regulations governing oxidizers used in pyrotechnic applications.
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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 |
|---|---|---|---|---|
| 2834291000 | CALCIUM NITRATES | $796K | 10.28% | $82K |
| 2834295100 | NITRATES, NESOI | $427K | 8.78% | $36K |
| 2834292000 | STRONTIUM NITRATES | $284K | 4.21% | $96 |
| 2834290500 | BISMUTH NITRATES | $139K | 30.50% | $106K |
CALCIUM NITRATES
NITRATES, NESOI
STRONTIUM NITRATES
BISMUTH NITRATES
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2834296150 | NITRATES, NESOI | $2.0M |
| 2834290500 | BISMUTH NITRATES | $229K |
NITRATES, NESOI
1.4M kg
BISMUTH NITRATES
327.2K 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 |
|---|---|---|---|
| Ohio | -- | $908K | +$908K |
| California | $239K | $281K | +$43K |
| Florida | $452K | $63K | -$389K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| PHILADELPHIA, PA | $234K | $210K | -$24K |
| NORFOLK-NEWPORT NEWS, VA | -- | $439K | +$439K |
| SAVANNAH, GA | $218K | $171K | -$47K |