AD+CVD ORDERS China A-570-898 (AD)C-570-991 (CVD)

U.S. Antidumping and Countervailing Duties on Chlorinated Isocyanurates from China (A-570-898 & C-570-991)

This is an educational summary — NOT a scope determination or filing advice. It does not decide whether your specific goods are covered. Always verify against the latest U.S. Commerce and CBP instructions.

Chlorinated isocyanurates from China may be subject to both a U.S. antidumping order (A-570-898) and a countervailing duty order (C-570-991).

Case snapshot

Product	Chlorinated Isocyanurates
Country	China
Case type	AD+CVD
Case number(s)	A-570-898 (AD) · C-570-991 (CVD)
Status	Active / continued
Scope control	Commerce written scope language
HTS role	Reference / screening only
Rate note	Varies by exporter/producer and administrative review

Key dates

A-570-898 (AD)	Federal Register: 2026-06 FR notice 2026-10938 (Opportunity to Request Review)
C-570-991 (CVD)	Federal Register: 2025-12 FR notice 2025-22201 (Opportunity to Request Review)
Status as of	Active — 2026-07-03
Expiration	No fixed expiration date. AD/CVD orders remain in place subject to five-year sunset reviews, and stay active unless revoked after Commerce/ITC review or other Commerce action.
Last checked by ETDETA	2026-07-03

Effective/entry-specific deposit and liquidation treatment depends on Commerce and CBP instructions, not only the publication date.

Chlorinated isocyanurates imported from China may fall within two U.S. Department of Commerce orders: antidumping case A-570-898 and countervailing duty case C-570-991. Because both an AD and a CVD order exist, importers of this chemical may face two separate cash-deposit requirements at entry and should verify scope and origin carefully.

Scope — simplified screening examples, not full legal scope

The official written scope controls. The examples below are screening references only.

Products that may be covered (examples)

•May include trichloroisocyanuric acid (TCCA) in powder, granular, or tableted form
•May include sodium dichloroisocyanurate (dihydrate)
•May include sodium dichloroisocyanurate (anhydrous)
•May include chlorinated isocyanurates sold as pool or water-treatment chemicals
•May include chlorinated isocyanurates in tablet form, including certain patented/formulated tablets
•May include chlorinated s-triazine trione derivatives of cyanuric acid in any of the covered forms

Products that may require separate review or may fall outside this order

?Cyanuric acid that has not been chlorinated may be outside the scope
?Non-chlorinated isocyanurate compounds may fall outside this order
?Other triazine-based chemicals that are not chlorinated isocyanurates may be excluded
?Products not matching the written chemical descriptions may be outside scope even if similar in use
?Finished consumer goods where the chlorinated isocyanurate is not the subject merchandise may warrant separate review

Scope control: HTS subheadings such as those under 2933.69 are provided for screening and customs convenience only; Commerce's written scope language is dispositive, and formulated, tableted, or blended forms may still be covered depending on that scope.

Who it affects

This typically matters for importers, distributors, and formulators bringing in chlorinated isocyanurate chemicals from China—commonly used in pool sanitizers, disinfectants, and water treatment—whether in powder, granular, or tablet form.

What the duty means

AD and CVD duties are collected as cash deposits at the time of entry; rates vary by exporter/producer and by administrative review and can be high. Because both an AD order (A-570-898) and a CVD order (C-570-991) exist, both deposits may apply. A 0% cash-deposit rate is NOT an exemption—the order still applies and entries must be declared.

Importer checklist — how to assess your risk

☐Gather the commercial invoice description and confirm it identifies the exact chemical composition
☐Collect product photos, spec sheets, and technical data sheets showing the compound and form (powder/granular/tablet)
☐Confirm the material composition against Commerce's written scope (TCCA, sodium dichloroisocyanurate dihydrate/anhydrous)
☐Document the intended use and any formulation or tableting done to the product
☐Obtain country-of-origin support and identify the actual manufacturer and exporter names
☐Verify the specific producer/exporter combination, since deposit rates attach to that pairing
☐Confirm the HTS classification as a screening step only, not as a scope conclusion
☐Consult a licensed customs broker or trade attorney to confirm scope—do not rely only on supplier statements
☐Verify the current cash-deposit rate against the latest Commerce results and CBP AD/CVD messages before filing

Risks to watch

⚠Circumvention or transshipment findings if goods are routed through third countries to disguise Chinese origin
⚠Scope inquiries where formulated or tableted products are found to fall within the order
⚠Using the wrong exporter/producer combination and applying an incorrect deposit rate
⚠Misdeclaration penalties and retroactive duty liability for entries not properly declared

The same chemical may be subject to orders from more than one country—chlorinated isocyanurates from Spain are also the subject of a U.S. proceeding—so importers should review each origin on its own facts.

FAQ

Is there antidumping duty on chlorinated isocyanurates from China?

There is a U.S. antidumping duty order on chlorinated isocyanurates from China under case A-570-898, and a separate countervailing duty order under C-570-991. Whether your specific goods are covered depends on Commerce's written scope, which you should verify.

Does a 0% deposit rate mean no duty?

No. A 0% cash-deposit rate is not an exemption. The order still applies, entries must be declared, and rates can change through administrative reviews. Always verify the current rate before filing.

Are formulated or tableted chlorinated isocyanurates covered?

They may still be covered depending on Commerce's scope. The scope explicitly notes powder, granular, and tableted forms, and Commerce has previously found certain patented, formulated tablets to fall within scope—confirm with a licensed broker or counsel.

Possible risk

Risk signal: Higher concern if the goods are chlorinated isocyanurates (TCCA or sodium dichloroisocyanurate) of Chinese origin; separate review is needed for formulations, tablets, blends, repackaged goods, and third-country processing.

Bottom line: Chlorinated isocyanurates from China may be covered by AD case A-570-898 and CVD case C-570-991; confirm scope, origin, exporter/producer identity, and current deposit rates before entry.

Not a scope determination or filing advice — confirm coverage and current deposit rates with a licensed customs broker and the latest Commerce/CBP instructions before entry.

Official sources

These links are for source verification. Confirm the latest applicable rate and instructions with Commerce/CBP before entry.

· Federal Register notice (2026-06 FR notice 2026-10938 (Opportunity to Request Review))
· Commerce ACCESS — AD/CVD proceedings & scope rulings
· CBP ACE AD/CVD case search & messages
· USITC sunset/injury reviews
HTS codes are provided for reference/screening only.

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Educational summary of a public U.S. Department of Commerce AD/CVD order — not legal advice, a customs broker opinion, or a scope determination. Whether specific goods fall within an order's scope must be confirmed with a licensed customs broker and the latest Commerce/CBP notices.

Last updated: 2026-07-10