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HSChapter 28
U.S. imports of sulfates, not elsewhere specified or included (HS 283329) totaled $19.5M in July 2026, traded with 32 countries.
Importers of Sulfates, Not Elsewhere Specified or Included paid $991K in duties in July 2026 — an effective duty rate of 11% on $9.4M in dutiable value, based on actual customs collections rather than the published tariff schedule. Sulfates, Not Elsewhere Specified or Included imports of $19.5M in July 2026 ran 17% above the year-to-date monthly average of $16.7M.
Last updated: July 2026 dataCobalt, iron, vanadium, chromium, zinc, and manganese sulfates—along with residual sulfates not covered by dedicated headings—are consolidated here across eight distinct 10-digit tariff lines, making correct line selection critical for duty and trade-remedy purposes. Cobalt sulfate (2833291000) is a key precursor in lithium-ion battery cathode manufacturing, giving this heading strategic importance in the EV supply chain. Mexico leads US imports under this heading, with China and India also significant sources; China-origin cobalt and vanadium sulfates may carry Section 301 exposure.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
426 shipments/mo
Cobalt sulfate is specifically enumerated under 2833291000. Correct line selection matters because cobalt sulfate sourced from certain countries may be subject to Section 301 tariffs, and the duty treatment can differ from other sulfates classified under the residual lines 2833295190 or 2833299100.
Mixed-metal sulfate solutions are classified by the component that gives the mixture its essential character, or under the residual 'NESOI' lines if no single metal predominates. A licensed customs broker should be consulted, as misclassification between the enumerated lines can affect both duty rates and trade-remedy applicability.
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Subheading 1 of 10 in heading 2833
Subheading 283329 · $19.5M of $36.2M
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 |
|---|---|---|---|---|---|
| 2833294500 | Zinc Sulfate | $10.6M | 1.09% | 43.83% | $115K |
| 2833295110 | Other Sulfates, Of Manganese | $4.0M | 9.34% | 56.28% | $371K |
| 2833295190 | Other Sulfates, NESOI | $2.6M | 3.05% | 20.90% | $79K |
| 2833292000 | Iron Sulfate | $1.8M | 22.71% | 79.05% | $419K |
| 2833291000 | Cobalt Sulfate | $496K | 1.37% | 98.01% | $7K |
| 2833294000 | Chromium Sulfate | $0 | -- | -- | -- |
| 2833293000 | Vanadium Sulfate | $0 | -- | -- | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2833299100 | Other Sulfates, NESOI | $4.0M |
| 2833294500 | Zinc Sulfate | $12K |
| 2833294000 | Chromium Sulfate | $3K |
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
$19.5MYoY · Pro
Exports
$4.0MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
Mexico and China together supply 48% of it.
customs district
destination
entry
rate provision · imports
52.0% enters free of duty; the effective duty rate is 5.08%.