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HSChapter 31
U.S. imports of double salts & mixtures of calcium & ammonium nitrate (HS 310260) totaled $10.3M in July 2026, traded with 16 countries.
Double Salts & Mixtures of Calcium & Ammonium Nitrate imports of $10.3M in July 2026 ran 34% above the year-to-date monthly average of $7.7M.
Last updated: July 2026 dataProducts combining calcium nitrate and ammonium nitrate as double salts or blended mixtures — distinct from the calcium carbonate-based CAN formulations of heading 310240 — are classified under 3102600000. Norway's Yara International is historically the dominant global producer of calcium ammonium nitrate double-salt grades, which explains Norway's leading position in US imports of this heading, with Lithuania and China also supplying the market. Like other ammonium nitrate-containing fertilizers, these products may be subject to DHS CFATS thresholds depending on their AN content, and trade professionals should verify current antidumping or countervailing duty orders for relevant origins.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
29 shipments/mo
Heading 310240 covers mixtures of ammonium nitrate with calcium carbonate (a non-nitrate calcium source), while heading 310260 covers double salts and mixtures where both the calcium and nitrogen components are in nitrate form — i.e., calcium nitrate combined with ammonium nitrate. The distinction requires a certificate of composition identifying the specific calcium compound present.
Norway is home to Yara International, one of the world's largest nitrogen fertilizer producers, which pioneered and continues to produce calcium ammonium nitrate double-salt grades at scale. This manufacturing concentration means a significant share of global supply originates from Norwegian facilities, making Norway a structurally dominant source for US importers.
Subheading 4 of 9 in heading 3102
Subheading 310260 · $10.3M of $196.8M
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ImportsExports
Imports
$10.3MYoY · Pro
Exports
$1.1MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 3102600000 | Double Salts & Mixtures Calcium & Ammonium Nitrate | $10.3M | 0.0036% | 0.04% | $370 |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3102600000 | Double Salts & Mixtures Calcium & Ammonium Nitrate | $1.1M |
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.
Imports · July 2026
origin
Norway and Lithuania together supply 99% of it.
customs district
destination
entry
rate provision · imports
100.0% enters free of duty; the effective duty rate is 0.00%.