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U.S. imports of chlorine (HS 280110) totaled $11.4M in July 2026, traded with 7 countries.
Importers of Chlorine paid $27K in duties in July 2026 — an effective duty rate of 10% on $255K in dutiable value, based on actual customs collections rather than the published tariff schedule. Chlorine imports of $11.4M in July 2026 ran 17% above the year-to-date monthly average of $9.7M.
Last updated: July 2026 dataElemental chlorine — a critical industrial chemical used in water treatment, PVC production, and pharmaceutical synthesis — is classified under a single tariff line (2801100000) and is subject to strict hazardous-materials transport regulations that shape import logistics as much as duty considerations. Canada and Mexico are the leading suppliers to the US market, reflecting the importance of proximity given chlorine's classification as a toxic gas requiring specialized pressurized containers. Importers should be aware that chlorine shipments may also trigger EPA Toxic Substances Control Act (TSCA) certification requirements at entry.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
311 shipments/mo
Chlorine is classified as a toxic gas under DOT regulations (UN 1017), requiring proper shipping papers, placarding, and use of DOT-specification pressure vessels. At the port of entry, CBP will coordinate with DOT and potentially EPA; importers must also submit an EPA TSCA certification (either a positive certification or a statement of exemption) with each shipment.
Because chlorine is a hazardous compressed gas with significant transport risk and cost, supply chains strongly favor nearby origins. Canada and Mexico lead US imports precisely because overland shipment in approved tank cars or ISO containers minimizes transit time and regulatory complexity compared to ocean freight from more distant sources.
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Subheading 2 of 3 in heading 2801
Subheading 280110 · $11.4M of $36.9M
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 | Duty Collected |
|---|---|---|---|---|---|
| 2801100000 | Chlorine | $11.4M | 0.23% | 2.25% | $27K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2801100000 | Chlorine | $469K |
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.
ImportsExports
Imports
$11.4MYoY · Pro
Exports
$469KYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
Canada and Mexico together supply 98% of it.
customs district
destination
entry
rate provision · imports
97.8% enters free of duty; the effective duty rate is 0.23%.