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HSChapter 29
U.S. imports of chlorodifluoroethanes (hcfc-142, hcfc-142b) (HS 290374) totaled $1.4M in April 2026, traded with 1 country.
Importers of Chlorodifluoroethanes (HCFC-142, HCFC-142b) paid $189K in duties in April 2026 — an effective duty rate of 14% on $1.4M in dutiable value, based on actual customs collections rather than the published tariff schedule. Chlorodifluoroethanes (HCFC-142, HCFC-142b) imports of $1.4M in April 2026 ran 32% below the year-to-date monthly average of $2.0M.
Last updated: April 2026 dataRegulated as ozone-depleting substances under the Montreal Protocol, HCFC-142 and HCFC-142b face EPA-administered consumption allowances that cap the volume importers may legally bring into the US in any given year. The single tariff line (2903740100) covers both isomers, which are used primarily as refrigerants and polymer-foam blowing agents. France is the leading US supplier under this heading, reflecting European chemical producers' role in transitional refrigerant supply chains.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
EPA consumption allowances are allocated on an annual basis, and once an importer's allowance is exhausted for the year, further imports are prohibited regardless of commercial contracts. Importers should track allowance balances carefully and coordinate shipment scheduling to avoid stranded cargo at the port of entry.
HCFC-142b contains chlorine in addition to fluorine and hydrogen, placing it in the HCFC subheadings of Chapter 29 and triggering Montreal Protocol controls. Fully chlorine-free HFCs (e.g., HFC-134a) classify elsewhere in the tariff schedule and are not subject to the same EPA allowance regime, so correct chemical identification is critical before filing entry.
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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 |
|---|---|---|---|---|
| 2903740100 | CHLORODIFLUOROETHANES | $1.4M | 13.70% | $189K |
CHLORODIFLUOROETHANES
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2903740100 | CHLORODIFLUOROETHANES | $0 |
CHLORODIFLUOROETHANES
NUCLEIC ACIDS & SALTS; OTHER HETEROCYCLIC CMP, NES
HS 293499
HETEROCYCLIC COMP W NITROGEN HETERO-ATM ONLY NESOI
HS 293399
POLYPEPTIDE PROTEIN& GLYCOPROTEIN HORMONES &DERIV
HS 293719
CMPDS CONT AN UNFUSED PYRIDINE RING ETC NESOI
HS 293339
COMP WITH PYRIMIDINE OR PIPERAZINE RING, NESOI
HS 293359
ANTIBIOTICS, NESOI
HS 294190
| State | Imports | Exports | Balance |
|---|---|---|---|
| New Jersey | $1.4M | -- | -$1.4M |
| Georgia | -- | -- | -- |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| NEWARK, NJ | $1.0M | -- | -$1.0M |
| NEW YORK, NY | $354K | -- | -$354K |