1-Hydroxyethylidene-1, 1-Diphosphonic Acid (HEDP) — China — A-570-045

This is an antidumping and countervailing duty measure, commonly abbreviated AD/CVD, concerning 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP). Antidumping (AD) measures address imports that an authority determines are sold at less than fair value, while countervailing duty (CVD) measures address benefits from foreign-government subsidies. These measures are generally tied to the product, exporting country, and often the producer or exporter—not simply to a product’s brand name.

For an importer, the key issue is whether the merchandise being entered matches the measure’s product scope and origin or exporting-country coverage. If it does, additional AD/CVD duties may apply alongside ordinary customs duties, and the importer of record may have responsibilities for entry reporting, deposits, recordkeeping, and later duty assessment. Product identity should be verified using the official scope language, tariff classification, and any listed exclusions; a customs broker or trade counsel may be needed when the facts are unclear.

What to check

• Read the official scope description for HEDP carefully, including chemical form, concentration, composition, packaging, and exclusions.
• Confirm the product’s tariff classification (HTSUS), country of origin, and actual exporter and producer; do not rely on the product name alone.
• Check whether the measure covers the specific exporting country and whether the producer or exporter has a company-specific treatment or instruction.
• Ask your customs broker how AD/CVD entry requirements, cash-deposit handling, and potential later liquidation or assessment apply.
• Keep technical specifications, safety data sheets, purchase records, origin documents, and supplier statements that support the product-scope and origin analysis.