1-Hydroxyethylidene-1, 1-Diphosphonic Acid (HEDP) — India — A-533-847

This is an antidumping and countervailing duty (AD/CVD) trade measure concerning 1-Hydroxyethylidene-1,1-Diphosphonic Acid, commonly called HEDP. Antidumping duties address imports sold at unfairly low prices, while countervailing duties address benefits or subsidies provided by a foreign government. The measure generally applies based on the product’s legal scope, not simply its marketing name or a company’s description.

It typically affects US importers, foreign producers and exporters, and sometimes related parties involved in importing HEDP or products that meet the scope description. An importer may owe additional duties beyond ordinary customs duty and must use the correct tariff classification, entry documentation, and deposit instructions. Scope decisions can depend on the product’s chemical identity, form, composition, and country of origin, so a customs broker or trade counsel may need to review borderline products.

What to check

• Read the official scope language and compare it with the product’s chemical name, formulation, concentration, physical form, and intended use.
• Confirm the product’s Harmonized Tariff Schedule (HTS) classification; do not assume the tariff number alone determines whether AD/CVD applies.
• Verify the country of origin, manufacturer, exporter, and any applicable producer- or exporter-specific instructions.
• Check the official AD/CVD order and current customs guidance for cash-deposit, entry, and documentation requirements.
• Keep technical specifications, safety data sheets, invoices, origin records, and supplier certifications; ask a customs broker or trade attorney to assess uncertain or mixed formulations.