1. On 04/28/2016, Commerce published in the Federal Register its initiation of the antidumping duty investigation of 1-Hydroxyethylidene-1, Diphosphonic Acid from the People's Republic of China (81 FR 25377).

2. The merchandise covered by this investigation includes all grades of aqueous acidic (non-neutralized) concentrations of 1-hydroxyethylidene-1, 1-diphosphonic acid (HEDP), also referred to as hydroxyethylidenendiphosphonic acid, hydroxyethanediphosphonic acid, acetodiphosphonic acid, and etidronic acid. The CAS (Chemical Abstract Service) registry number for HEDP is 2809-21-4. The merchandise subject to this investigation is currently classified in the Harmonized Tariff Schedule of the United States (HTSUS) at subheading 2931.90.9043. It may also enter under HTSUS subheadings 2811.19.6090 and 2931.90.9041. While HTSUS subheadings and the CAS registry number are provided for convenience and customs purposes only, the written description of the scope of this investigation is dispositive.

3. This investigation has been assigned investigation number A-570-045.

4. If there are any questions by the importing public regarding this message, please contact the Call Center for the Office of AD/CVD Operations, Enforcement and Compliance, International Trade Administration, U.S. Department of Commerce at (202) 482-0984. CBP ports should submit their inquiries through authorized CBP channels only. (This message was generated by OV:OQ.)

5. There are no restrictions on the release of this information.

Alexander Amdur