AD+CVD ORDERS China A-570-049 (AD)C-570-050 (CVD)

U.S. Antidumping and Countervailing Duties on Ammonium Sulfate from China (A-570-049 / C-570-050)

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.

Ammonium sulfate from China may be covered by both a U.S. antidumping order (A-570-049) and a countervailing duty order (C-570-050).

Case snapshot

Product	Ammonium Sulfate
Country	China
Case type	AD+CVD
Case number(s)	A-570-049 (AD) · C-570-050 (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-570-049 (AD)	Federal Register: 2026-03 FR notice 2026-04059 (Opportunity to Request Review)
C-570-050 (CVD)	Federal Register: 2026-03 FR notice 2026-04059 (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.

Ammonium sulfate from China may fall within the scope of two U.S. Department of Commerce orders: an antidumping duty order (A-570-049) and a countervailing duty order (C-570-050). Importers of this product should verify whether their goods may be covered, because both AD and CVD cash deposits may apply at entry.

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 ammonium sulfate in standard granular form
•May include ammonium sulfate in crystalline (crystal) form
•May include ammonium sulfate in powder form
•May include ammonium sulfate sold as a fertilizer product
•May include ammonium sulfate used as an industrial or feed-grade input
•May include ammonium sulfate imported in bulk or bagged packaging
•May include ammonium sulfate regardless of purity level, subject to Commerce's written scope

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

?Other nitrogen fertilizers such as urea or ammonium nitrate may fall outside this order
?Compound or blended fertilizers where ammonium sulfate is combined with other nutrients may be treated differently (verify with Commerce scope)
?Ammonium sulfate produced in and shipped from countries other than China may not be covered by these particular orders
?Non-fertilizer chemical products that are chemically distinct from ammonium sulfate may fall outside scope
?Products that do not meet Commerce's written scope description may be excluded

Scope control: Any HTS codes are screening references only; Commerce's written scope language controls whether a product is covered, and blended, repackaged, or further-processed forms may still fall within scope depending on that language.

Who it affects

This typically matters for importers, distributors, and blenders sourcing ammonium sulfate fertilizer or industrial-grade ammonium sulfate of Chinese origin, including those buying through third-country traders.

What the duty means

If covered, importers may owe AD and/or CVD cash deposits at the time of entry; rates vary by exporter/producer and by administrative review and can be significant. A 0% cash-deposit rate is NOT an exemption — the order still applies and the entry must be declared. Because both an AD and a CVD order exist here, deposits under both may apply.

Importer checklist — how to assess your risk

☐Gather the commercial invoice with the full product description and grade.
☐Collect product photos, spec sheets, and technical data showing form and composition.
☐Confirm the material composition and percentage of ammonium sulfate versus any other ingredients.
☐Document the intended use (fertilizer, feed, industrial) to support scope screening.
☐Obtain country-of-origin support tracing where the product was actually produced.
☐Identify the manufacturer and exporter names and confirm the exact producer/exporter combination.
☐Determine the correct HTS classification for reference and screening.
☐Consult a licensed customs broker or trade counsel to confirm scope; do not rely only on supplier statements.
☐Verify the applicable cash-deposit rate against current 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 that could bring uncertain or blended products within the order.
⚠Applying the wrong exporter/producer combination and therefore the wrong deposit rate.
⚠Misdeclaration or misclassification that can trigger penalties and retroactive duty liability.

The same product can be subject to trade-remedy orders from multiple countries, so importers should independently check the actual country of production for each shipment rather than assume any origin is unaffected.

FAQ

Is there antidumping duty on ammonium sulfate from China?

There is a U.S. antidumping duty order (A-570-049) and a countervailing duty order (C-570-050) on ammonium sulfate from China; whether your specific goods may be covered depends on Commerce's written scope, and importers should verify before entry.

Does a 0% deposit rate mean no duty?

No. A 0% cash-deposit rate is not an exemption. The order still applies, the entry must be declared, and rates can change through administrative reviews, so verify the current rate against Commerce results and CBP messages.

Are blended or repackaged ammonium sulfate products covered?

They may still be covered depending on Commerce's scope language. Blended, further-processed, or repackaged forms should be reviewed carefully with a licensed broker or counsel rather than assumed to be outside the order.

Possible risk

Risk signal: Higher concern if the goods are ammonium sulfate fertilizer or industrial-grade ammonium sulfate of Chinese origin; a separate review is needed for blends, formulations, repackaged goods, and third-country processing. This does not state your goods are covered.

Bottom line: Ammonium sulfate from China may be covered by A-570-049 (AD) and C-570-050 (CVD); 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 (2026-03 FR notice 2026-04059 (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: 2026-07-04