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HSChapter 28
U.S. imports of sulfates, not elsewhere specified or included (HS 283329) totaled $14.6M in April 2026, traded with 28 countries.
Importers of Sulfates, Not Elsewhere Specified or Included paid $293K in duties in April 2026 — an effective duty rate of 5.3% on $5.5M in dutiable value, based on actual customs collections rather than the published tariff schedule. Sulfates, Not Elsewhere Specified or Included imports of $14.6M in April 2026 ran 12% below the year-to-date monthly average of $16.6M.
Last updated: April 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.
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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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 |
|---|---|---|---|---|
| 2833294500 | ZINC SULFATE | $7.6M | 4.98% | $47K |
| 2833295110 | OTHER SULFATES, OF MANGANESE | $3.8M | 4.78% | $93K |
| 2833291000 | COBALT SULFATE | $1.7M | 1.40% | $21K |
| 2833292000 | IRON SULFATE | $858K | 15.21% | $86K |
| 2833295190 | OTHER SULFATES, NESOI | $625K | 8.01% | $47K |
| 2833294000 | CHROMIUM SULFATE | $0 | -- | -- |
| 2833293000 | VANADIUM SULFATE | $0 | -- | -- |
ZINC SULFATE
OTHER SULFATES, OF MANGANESE
COBALT SULFATE
IRON SULFATE
OTHER SULFATES, NESOI
CHROMIUM SULFATE
VANADIUM SULFATE
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2833299100 | OTHER SULFATES, NESOI | $3.2M |
| 2833294500 | ZINC SULFATE | $69K |
| 2833294000 | CHROMIUM SULFATE | $25K |
OTHER SULFATES, NESOI
3.2M kg
ZINC SULFATE
111.9K kg
CHROMIUM SULFATE
5.0K 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
| Port | Imports | Exports | Balance |
|---|---|---|---|
| LAREDO, TX | $5.7M | $37K | -$5.6M |
| NEW ORLEANS, LA | $1.3M | -- | -$1.3M |
| BALTIMORE, MD | $1.0M | -- | -$1.0M |