1-Hydroxyethylidene-1, 1-Diphosphonic Acid (HEDP) — China — C-570-046

A measure titled “1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP)” is an antidumping duty (AD) and countervailing duty (CVD) trade measure. AD addresses imports sold in the United States at less than fair value, while CVD addresses benefits that a foreign government provides to producers or exporters. These measures are separate from ordinary customs duty and may apply in addition to it.

The measure typically affects US importers bringing covered HEDP products, or products meeting the official product-scope description, from specified countries or sources. The chemical name, concentration, form, packaging, and intended use may matter, but customs classification alone does not decide whether merchandise is covered. Importers should compare the actual product and supply chain with the official scope, identify the manufacturer and exporter, and confirm the applicable AD/CVD entry requirements. A customs broker or trade counsel may be needed for a binding classification, scope, or compliance judgment.

What to check

• Read the official product-scope language and compare it with the product’s chemical composition, concentration, physical form, and packaging—not just its commercial name.
• Confirm the country of origin, manufacturer, exporter, and any intermediate trading parties; AD/CVD treatment can depend on these facts.
• Review the relevant tariff classification as a filing and identification tool, while remembering that scope language generally controls coverage.
• Ask your customs broker to verify cash-deposit, entry-documentation, and importer-of-record obligations before importing potentially covered merchandise.
• Keep technical specifications, safety data sheets, purchase records, and origin documents so you can support a scope or coverage determination if questioned.