U.S. exports of Double Salts & Mixtures of Ammonium Sulfate (NESOI) (HS 310229) totaled $232K in August 2026.
Double Salts & Mixtures of Ammonium Sulfate (NESOI) imports of $47K in August 2026 ran 67% below the year-to-date monthly average of $143K.
Last updated: August 2026 dataFertilizer products that combine ammonium sulfate with other salts or carriers — but do not fit the pure ammonium sulfate heading — fall under 3102290000 as double salts and mixtures not elsewhere specified. Germany and the Netherlands are the leading US suppliers, reflecting Europe's advanced specialty-fertilizer manufacturing base. These blended or co-crystallized products are often formulated to improve handling characteristics or nutrient release profiles compared with straight ammonium sulfate. Correct classification hinges on whether the product is a true double salt (co-crystallized) versus a mechanical mixture, a distinction customs examiners may scrutinize.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
1 import shipments a month
A double salt is a chemically distinct compound formed by co-crystallization of two salts (e.g., ammonium magnesium sulfate), while a mixture is a physical blend of separate components. Customs authorities may request laboratory analysis or a certificate of composition to confirm which category applies, as the distinction affects the correct 10-digit classification.
Both countries host large integrated chemical and fertilizer complexes with the technical capacity to produce co-crystallized double salts and precision-blended fertilizer products. Their proximity to major European ports also supports cost-competitive bulk ocean freight to US Gulf and East Coast terminals.
Subheading 8 of 9 in heading 3102
Subheading 310229 · $232K of $135.6M
ImportsExports
Imports
$47KYoY · free account
Exports
$232KYoY · free account
Low of 11 reported months · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $1.5M of Double Salts & Mixtures of Ammonium Sulfate (NESOI) and exported $1.7M.
Fewer than 6 of the last 12 months reported trade, or the latest month was under $500K; the trend chart is not shown for thin series.
Through August 2026 · imports 11 of 12 months reported. Source: U.S. Census Bureau.
Exports · August 2026
destination
Peru and Japan together take 65% of it.
customs district
origin
entry
rate provision · imports
100.0% enters free of duty; duty collected equals 0.00% of imports for consumption.
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 |
|---|---|---|---|---|
| 3102290000 | Double Salts & Mixtures of Ammonium Sulfate, NESOI | $47K | 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 |
|---|---|---|
| 3102290000 | Double Salts & Mixtures of Ammonium Sulfate, NESOI | $232K |
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.
Trade Directory
List your company under HS 310229 — Double Salts & Mixtures of Ammonium Sulfate (NESOI), so the companies trading it can find you. Be the first supplier listed.