AD ORDER China A-570-121 (AD)

U.S. Antidumping Duty on Difluoromethane (R-32) from China (A-570-121)

This is an educational summary — NOT a scope determination or filing advice. It does not decide whether your specific goods are covered. Always verify against the latest U.S. Commerce and CBP instructions.

Difluoromethane (R-32) from China may be subject to U.S. antidumping duty order A-570-121 (AD only).

Case snapshot

Product	Difluoromethane
Country	China
Case type	AD
Case number(s)	A-570-121 (AD)
Status	Active / continued
Scope control	Commerce written scope language
HTS role	Reference / screening only
Rate note	Varies by exporter/producer and administrative review

Key dates

A-570-121 (AD)	Federal Register: 2026-03 FR notice 2026-04059 (Opportunity to Request Review)
Status as of	Active — 2026-07-03
Expiration	No fixed expiration date. AD/CVD orders remain in place subject to five-year sunset reviews, and stay active unless revoked after Commerce/ITC review or other Commerce action.
Last checked by ETDETA	2026-07-03

Effective/entry-specific deposit and liquidation treatment depends on Commerce and CBP instructions, not only the publication date.

The U.S. Department of Commerce maintains antidumping duty order A-570-121 on difluoromethane (R-32) from China. This is an antidumping (AD) order only; no countervailing duty case number was provided here. Importers of R-32 refrigerant of Chinese origin should carefully review whether their goods may fall within its scope.

Scope — simplified screening examples, not full legal scope

The official written scope controls. The examples below are screening references only.

Products that may be covered (examples)

•Difluoromethane (R-32) refrigerant of Chinese origin, regardless of form, type, or purity level (may include)
•R-32 also sold under names such as HFC-32, FC-32, Freon-32, methylene difluoride, or halocarbon R32 (may include)
•Unpurified R-32 that is later purified or processed in a third country or the United States (may include)
•R-32 blended with products other than R-125 where the blend contains 85% or more R-32 by volume (may include)
•R-32 blended with any amount of R-125 where the blend contains more than 52% R-32 by volume (may include)
•R-32 commingled with R-32 from non-subject sources (only the subject component may be covered)
•R-32 shipped under UN 3252 or CAS number 75-10-5 (may include)

Products that may require separate review or may fall outside this order

?Refrigerant blends covered instead by the separate antidumping order on hydrofluorocarbon blends from China (the Blends Order) may be outside this scope
?Pentafluoroethane (R-125) and other individual refrigerants that are not R-32 (typically outside)
?Blends other than with R-125 that contain less than 85% R-32 by volume (may be outside)
?Blends with R-125 that contain 52% or less R-32 by volume (may be outside)
?Non-R-32 components of a blend or commingled product (only the R-32 component is typically covered)

Scope control: HTSUS subheadings (such as 2903.39.2035) and the CAS registry number are provided for screening convenience only; Commerce's written scope language is dispositive, and blended, commingled, unpurified, or third-country-processed R-32 may still fall within scope depending on that written description.

Who it affects

This typically matters for importers, distributors, and end-users of R-32 refrigerant, refrigerant blends containing R-32, and unpurified or reprocessed R-32 material that may trace to Chinese-origin R-32.

What the duty means

If merchandise falls within scope, AD cash deposits are collected at entry; rates vary by exporter/producer and by administrative review and can be substantial. A 0% cash-deposit rate is NOT an exemption — the order still applies and entries must be declared. Only an AD case is provided here, so no CVD deposit is indicated on these facts.

Importer checklist — how to assess your risk

☐Gather the commercial invoice and confirm the exact chemical description (R-32, HFC-32, CAS 75-10-5).
☐Collect product spec sheets, certificates of analysis, and purity/blend composition data.
☐Determine the actual percentage by volume of R-32 in any blend, and whether R-125 is present.
☐Verify the country of origin and any third-country purification or processing steps.
☐Identify and document both the manufacturer/producer and the exporter names.
☐Confirm the specific exporter/producer combination against current Commerce separate-rate results.
☐Screen the HTSUS classification (e.g., 2903.39.2035) but treat it as reference only.
☐Confirm scope questions with a licensed customs broker or qualified trade counsel; do not rely only on supplier statements.
☐Verify the applicable cash-deposit rate against current Commerce results and CBP AD/CVD messages before filing.

Risks to watch

⚠Circumvention or transshipment findings where Chinese R-32 is routed or lightly processed through third countries.
⚠Scope inquiries over blends, commingled material, or unpurified R-32 that may still be covered.
⚠Declaring the wrong exporter/producer combination, which can change the applicable deposit rate.
⚠Misdeclaration of composition, origin, or value leading to penalties and retroactive duty liability.

R-32 and refrigerant blends may be subject to separate Commerce orders depending on origin and blend composition (including the separate China Blends Order), so each origin and product formulation should be reviewed independently.

FAQ

Is there antidumping duty on difluoromethane (R-32) from China?

Commerce maintains antidumping duty order A-570-121 on difluoromethane (R-32) from China. Whether your specific goods fall within scope depends on Commerce's written scope language; importers should verify before entry.

Does a 0% deposit rate mean no duty?

No. A 0% cash-deposit rate is not an exemption. The order still applies, entries must be declared, and rates can change through administrative reviews, so importers should verify current rates and CBP messages.

Are blended or commingled R-32 products covered?

They may still be covered depending on Commerce scope: certain R-32 blends (for example, more than 52% R-32 by volume with R-125, or 85% or more with other products) and commingled R-32 may fall within scope for the R-32 component. Verify with Commerce's written scope.

Possible risk

Risk signal: Higher concern if the goods are R-32 refrigerant of Chinese origin; a separate review is needed for R-32 blends, commingled material, unpurified R-32, and R-32 purified or processed in a third country.

Bottom line: Difluoromethane (R-32) from China may be covered by AD order A-570-121; confirm scope, blend composition, origin, exporter/producer identity, and current deposit rates before entry.

Not a scope determination or filing advice — confirm coverage and current deposit rates with a licensed customs broker and the latest Commerce/CBP instructions before entry.

Official sources

These links are for source verification. Confirm the latest applicable rate and instructions with Commerce/CBP before entry.

· Federal Register notice (2026-03 FR notice 2026-04059 (Opportunity to Request Review))
· Commerce ACCESS — AD/CVD proceedings & scope rulings
· CBP ACE AD/CVD case search & messages
· USITC sunset/injury reviews
HTS codes are provided for reference/screening only.

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Educational summary of a public U.S. Department of Commerce AD/CVD order — not legal advice, a customs broker opinion, or a scope determination. Whether specific goods fall within an order's scope must be confirmed with a licensed customs broker and the latest Commerce/CBP notices.

Last updated: 2026-07-12