Loading...
HSChapter 28
U.S. imports of thiosulfates (HS 283230) totaled $149K in April 2026, traded with 9 countries.
Importers of Thiosulfates paid $37K in duties in April 2026 — an effective duty rate of 27% on $140K in dutiable value, based on actual customs collections rather than the published tariff schedule. Thiosulfates imports of $149K in April 2026 ran 22% below the year-to-date monthly average of $191K.
Last updated: April 2026 dataSodium thiosulfate — the photographic 'hypo' fixer and a medical antidote for cyanide poisoning — is the commercially dominant product in this heading, now separately enumerated under 2832301000, with other thiosulfate salts captured in 2832305000. Vietnam and China together account for the bulk of US imports, making this heading one where supply-chain concentration in Southeast and East Asia is a practical sourcing consideration. The heading also covers ammonium thiosulfate, widely used as a liquid fertilizer and gold leaching agent.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Ammonium thiosulfate in its chemical form (not formulated as a fertilizer mixture) is classified under the thiosulfates heading (283230) rather than under fertilizer headings. If it is imported as part of a formulated fertilizer blend, classification may shift depending on the composition. A licensed customs broker should review the product specification and intended use before filing.
A certificate of analysis or SDS identifying the compound by chemical name and CAS number is the standard supporting document. CBP may request this to confirm whether the product is sodium thiosulfate specifically or another thiosulfate salt, particularly when the commercial invoice uses a generic trade name.
Monthly import values over time
Supplier Network
Get discovered by U.S. importers searching for HS 283230 — Thiosulfates. Be the first supplier listed.
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2832301000 | SODIUM THIOSULFATE | $136K | 27.05% | $37K |
| 2832305000 | THIOSULFATES, EXCEPT SODIUM THIOSULFATE, NESOI | $13K | 13.11% | $540 |
SODIUM THIOSULFATE
THIOSULFATES, EXCEPT SODIUM THIOSULFATE, NESOI
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2832300000 | THIOSULFATES | $3.4M |
THIOSULFATES
8.8M 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 |
|---|---|---|---|
| PORT HURON, MI | -- | $1.9M | +$1.9M |
| EL PASO, TX | -- | $720K | +$720K |
| CALEXICO-EAST, CA | -- | $329K | +$329K |