Difluoromethane (R-32) — China — A-570-121

A US AD/CVD measure concerning Difluoromethane (R-32) is a trade-remedy action involving a particular chemical product, often identified by its chemical name, refrigerant designation, product description, and tariff classification. AD means antidumping: the government may impose an additional duty when imports are found to be sold in the United States at less than fair value. CVD means countervailing duty: an additional duty may apply when imports benefit from foreign-government subsidies. These duties are separate from ordinary customs duty.

The measure typically affects importers, manufacturers, distributors, and other parties bringing covered R-32 into the United States from the countries or producers identified in the official measure. Coverage depends on the legal product scope, origin, exporter or producer, and any applicable exclusions—not solely on the product name or HTSUS classification. It matters because an importer may need to pay additional duties, provide accurate entry information, and manage potential liability for incorrect declarations. A customs broker or trade-remedy specialist may be needed to interpret scope and responsibility in a specific transaction.

What to check

• Read the official scope language and compare the product’s chemical composition, physical form, packaging, and intended use; do not rely on the product name alone.
• Confirm the country of origin and identify the actual producer and exporter, because AD/CVD treatment can vary by country and company.
• Check the applicable HTSUS classification, while remembering that an HTSUS number is an identification aid and does not by itself determine whether the product is covered.
• Ask your customs broker to verify the required AD/CVD entry information, cash-deposit instructions, and importer-of-record responsibilities before shipment.
• Keep product specifications, supplier statements, origin records, and classification research so you can support the coverage analysis if Customs or another agency asks.