C-570-046: countervailing duty order on 1-Hydroxyethylidene-1, 1-Diphosphonic Acid (HEDP) from China

C-570-046 is the US Department of Commerce case number for the countervailing duty order on 1-Hydroxyethylidene-1, 1-Diphosphonic Acid (HEDP) from China, in force since May 18, 2017, and continued after a sunset review on December 1, 2022. If your goods are in scope, you pay a countervailing cash deposit at entry on top of the normal duty.

Reviewed September 2026 against the ITA order list and the Federal Register.

Case numberC-570-046Countervailing duty (CVD)
Companion antidumping duty caseA-570-045 antidumping →same product and country under the other duty law; an entry pays both deposits
Product1-Hydroxyethylidene-1, 1-Diphosphonic Acid (HEDP) ITA commodity group: Chemicals and Allied Industries
CountryChina
StatusCurrent Order
Order dateMay 18, 2017 82 FR 22809
Latest continuationDecember 1, 2022 87 FR 73756
Next sunset reviewNovember 2027 the month Commerce is due to start the five-year review

Rates published in the order notice

2.40%All-others subsidy rate

As printed in the order notice (82 FR 22809, May 18, 2017). Your deposit today may differ: it is the rate the latest administrative review assigned to the exporter or producer on your invoice, which can be higher or lower. A company that has never been reviewed keeps the all-others rate. Check your supplier's current rate in Commerce's ACCESS case record before you price an order.

Scope, from the order notice

Scope of the Order The scope of this order covers HEDP from the PRC. For a complete description of the scope, see Appendix.

Excerpt from 82 FR 22809. Later scope rulings and circumvention findings can change the scope; check the Federal Register notices below.

What C-570-046 means when you import

Cash deposit at entry. For every entry of goods in scope, CBP collects an estimated countervailing duty cash deposit at the rate assigned to the exporter or producer on the entry, on top of the Column 1 duty and any Chapter 99 trade-remedy lines. Because a companion antidumping case exists, an entry of 1-Hydroxyethylidene-1, 1-Diphosphonic Acid (HEDP) from China carries both deposits.

Your supplier sets your rate. The same product from two plants in China can deposit at different rates. Before you price the order, ask the supplier which legal entity will appear as exporter and as producer on the invoice.

Deposit now, final duty later. The deposit is not the final duty. The entry stays unliquidated until Commerce completes the administrative review for the period it was entered in. CBP then liquidates it at the rate that review sets and bills or refunds the difference with interest. AD/CVD entries can stay open for years, and the importer of record carries the difference. A review happens only if Commerce is asked for one in the order's anniversary month; if nobody asks, entries liquidate at the deposit rate.

Reimbursement certificate. Before liquidation, the importer files a certificate under 19 CFR 351.402(f)(2) stating whether the exporter has paid or reimbursed the antidumping duty. Without it, Commerce may presume reimbursement and deduct the duty a second time in the margin calculation. Brokers file it with the entry summary; make sure yours does.

Entry reporting. The AD/CVD case number goes on the 7501 line alongside the HTS number, and any Chapter 99 lines the goods carry are reported in the order CBP prescribes; the tariff updates tracker carries the current Chapter 99 sequence and the actions behind it.

Shipping from a third country doesn't change the origin. Goods finished, cut or packaged in a third country stay in scope if the notice's written scope covers them. A change of shipping origin is not a change of AD/CVD origin.

Estimating the stack. The tariff simulator returns the Column 1 rate and the Chapter 99 additional duties for an HTS number and origin. It does not include antidumping or countervailing deposits, so add the deposit at your supplier's current rate on top. Airlift USA does not hold a US customs broker license; entries on cargo we move are filed through our licensed broker network.

Federal Register notices

All 14 notices on docket C-570-046 at federalregister.gov → · Case record in Commerce's ACCESS →

Other AD/CVD cases on goods from China

Search all AD/CVD orders in place by product, country or case number →

Case list: AD/CVD Orders and Suspension Agreements, International Trade Administration, Enforcement and Compliance — ITA dashboard, export of September 2026. Notices, rates and HTS numbers: Federal Register API v1. Both are US Government works in the public domain. This page is a reference, not legal or customs advice.

Importing 1-Hydroxyethylidene-1, 1-Diphosphonic acid (HEDP) from China under C-570-046?

Send us the product, the exporter and producer named on the invoice, the load port, the US delivery point and the ready date. We quote the ocean freight and destination charges and explain how the entry is filed through our licensed broker network. The AD/CVD cash deposit itself is set by the rate on the entry, not by us.

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Please add: Exporter and producer on the invoice, load port, US delivery point, container type and count, ready date

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