U.S. exports of Dithionites & Sulfoxylates (Except Sodium) (HS 283190) totaled $14K in August 2026.
Dithionites & Sulfoxylates (Except Sodium) imports of $2K in August 2026 ran 45% below the year-to-date monthly average of $4K.
Last updated: August 2026 dataZinc 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.
1 import shipments a month
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.
Subheading 2 of 2 in heading 2831
Subheading 283190 · $14K of $136K
ImportsExports
Imports
$2KYoY · free account
Exports
$14KYoY · free account
Low of 7 reported months · imports
Low · free accountOver the twelve months to August 2026, the U.S. exported $94K of Dithionites & Sulfoxylates (Except Sodium).
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 7 of 12 months reported, exports 9 of 12 months reported. Source: U.S. Census Bureau.
Trade Directory
List your company under HS 283190 — Dithionites & Sulfoxylates (Except Sodium), so the companies trading it can find you. Be the first supplier listed.
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 | Duty Collected |
|---|---|---|---|---|---|
| 2831900000 | Dithionites & Sulfoxylate, Exc of Sodium, NESOI | $2K | 15.51% | 100.00% | $365 |
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 | $14K |
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.
Exports · August 2026
destination
Canada and Colombia together take 100% of it.
customs district
origin
entry
rate provision · imports
duty collected equals 15.51% of imports for consumption.