U.S. exports of Thiosulfates (HS 283230) totaled $936K in August 2026.
Importers of Thiosulfates paid $37K in duties in August 2026, an average duty rate of 16.74% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 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.
12 import shipments a month
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.
Subheading 3 of 3 in heading 2832
Subheading 283230 · $936K of $3.4M
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 |
|---|---|---|---|---|---|
| 2832301000 | Sodium Thiosulfate | $221K | 16.74% | 97.22% | $37K |
| 2832305000 | Thiosulfates, Except Sodium Thiosulfate, NESOI | — | -- | -- | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2832300000 | Thiosulfates | $936K |
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.
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ImportsExports
Imports
$221KYoY · free account
Exports
$936KYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $4.4M of Thiosulfates and exported $28.6M.
Through August 2026. Source: U.S. Census Bureau.
Exports · August 2026
destination
Mexico and Canada together take 81% of it.
customs district
origin
entry
rate provision · imports
2.8% enters free of duty; duty collected equals 16.74% of imports for consumption.