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HSChapter 28
U.S. imports of chlorine (HS 280110) totaled $10.0M in April 2026, traded with 7 countries.
Importers of Chlorine paid $21K in duties in April 2026 — an effective duty rate of 10% on $212K in dutiable value, based on actual customs collections rather than the published tariff schedule. Chlorine imports of $10.0M in April 2026 ran 12% above the year-to-date monthly average of $8.9M.
Last updated: April 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.
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.
Monthly import values over time
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| CANADA | $6.2M | $8K | -$6.2M |
| MEXICO | $3.6M | -- | -$3.6M |
| KOREA, SOUTH | $115K | -- | -$115K |
| COLOMBIA | $56K | -- | -$56K |
| ST LUCIA | -- | $45K | +$45K |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2801100000 | CHLORINE | $10.0M | 10.00% | $21K |
CHLORINE
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2801100000 | CHLORINE | $202K |
CHLORINE
149.0K 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
| State | Imports | Exports | Balance |
|---|---|---|---|
| Indiana | $1.6M | -- | -$1.6M |
| California | $1.3M | $19K | -$1.3M |
| Illinois | $1.3M | -- | -$1.3M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| MOBILE, AL | $2.4M | -- | -$2.4M |
| PORT HURON, MI | $2.3M | -- | -$2.3M |
| BLAINE, WA | $1.9M | -- | -$1.9M |