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HSChapter 28
U.S. imports of thionyl chloride (HS 281217) totaled $211K in April 2026, traded with 3 countries.
Thionyl Chloride imports of $211K in April 2026 ran 19% above the year-to-date monthly average of $178K.
Last updated: April 2026 dataThionyl chloride (SOCl₂) is a highly reactive chlorinating agent central to pharmaceutical active ingredient synthesis and agrochemical production, where it converts carboxylic acids to acyl chlorides. Germany and India are the leading US suppliers, with Switzerland also a notable source — a pattern reflecting the compound's tight integration with European and South Asian fine-chemical manufacturing networks. Its extreme moisture sensitivity and corrosive properties require full DOT hazardous materials compliance, and importers should confirm TSCA certification requirements are met before filing entry.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Thionyl chloride reacts violently with water, releasing sulfur dioxide and hydrogen chloride gases. Shipments must be packaged in sealed, moisture-proof containers meeting DOT corrosive material standards, and carriers must be notified of the hazard class. Any breach of packaging integrity can create both safety hazards and customs examination delays.
Thionyl chloride is listed as a Schedule 3 precursor under the Chemical Weapons Convention. While commercial trade is permitted, importers may encounter end-use declaration requirements from exporting countries and should ensure their documentation clearly identifies the industrial or pharmaceutical end-use to facilitate smooth customs clearance.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| GUYANA | -- | $459K | +$459K |
| INDIA | $124K | -- | -$124K |
| GERMANY | $86K | -- | -$86K |
| SWITZERLAND | -- | -- | -- |
| BELGIUM | -- | -- | -- |
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 |
|---|---|---|---|---|
| 2812170000 | THIONYL CHLORIDE | $211K | 9.83% | $4K |
THIONYL CHLORIDE
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2812170000 | THIONYL CHLORIDE | $459K |
THIONYL CHLORIDE
1.4K 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 |
|---|---|---|---|
| MIAMI INTERNATIONAL AIRPORT, FL | -- | $459K | +$459K |
| NORFOLK-NEWPORT NEWS, VA | $188K | -- | -$188K |
| BALTIMORE, MD | $23K | -- | -$23K |