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HSChapter 28
U.S. imports of dithionites & sulfoxylates (except sodium) (HS 283190) totaled $21K in June 2026, traded with 2 countries.
Dithionites & Sulfoxylates (Except Sodium) imports of $21K in June 2026 ran 296% above the year-to-date monthly average of $5K.
Zinc dithionite, calcium dithionite, and other non-sodium dithionites and sulfoxylates are consolidated under a single 10-digit line, 2831900000, reflecting their more limited commercial volumes compared to the sodium-based counterparts. These compounds find use as reducing agents in specialty dyeing, wastewater treatment, and certain polymer applications. India is the leading US supplier, followed by Germany and Japan. Importers should note that some non-sodium dithionites share the same flammable-solid hazmat classification as sodium dithionite and require equivalent DOT-compliant packaging.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Section 301 tariffs apply based on the country of origin and the specific HTS classification. Goods classified under 2831900000 originating from China would be evaluated under the applicable Section 301 list covering that line. Importers should confirm current tariff treatment with a licensed customs broker, as list coverage and rates can change.
Zinc dithionite and similar compounds are used as reducing agents in specialty textile dyeing, paper brightening, and certain wastewater dechlorination applications. Their lower reactivity compared to sodium dithionite can make them preferable in processes requiring more controlled reduction kinetics.
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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| INDIA | $21K | -- | -$21K |
| CANADA | -- | $4K | +$4K |
| ITALY | -- | -- | -- |
| TURKEY | -- | -- | -- |
| UNITED KINGDOM | -- | -- | -- |
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 |
|---|---|---|---|---|
| 2831900000 | DITHIONITES & SULFOXYLATE, EXC OF SODIUM, NESOI | $21K | 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 |
|---|---|---|
| 2831900000 | DITHIONITES & SULFOXYLATE, EXC OF SODIUM, NESOI | $4K |
URANIUM ENRICHED IN U235 ETC. PLUTONIUM ETC.
HS 284420
ANHYDROUS AMMONIA
HS 281410
NATURAL URANIUM & COMPOUNDS, ALLOYS & CERAMICS ETC
HS 284410
TUNGSTATES (WOLFRAMATES)
HS 284180
ALLOYS, DISPERSIONS,ISOTOPES & COMPOUNDS NES
HS 284443
ALUMINUM OXIDE, EXCEPT ARTIFICIAL CORUNDUM, NESOI
HS 281820
| State | Imports | Exports | Balance |
|---|---|---|---|
| New York | $21K | -- | -$21K |
| South Carolina | -- | $4K | +$4K |
| Kansas | -- | -- | -- |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| NEW YORK, NY | $21K | -- | -$21K |
| CHAMPLAIN-ROUSES POINT, NY | -- | $4K | +$4K |
| CHARLESTON, SC | -- | -- | -- |