Tariffs & HTS
Mexico final antidumping duty on ammonium sulfate from China
Mexico's 14 August final antidumping decision imposes 0.1488 USD/kg on Chinese-origin ammonium sulfate from 15 August 2026. The product is the inorganic nitrogen fertilizer ammonium sulfate, including standard and granular forms; the measure applies under TIGIE 3102.21.01 or any other line, regardless of shipping country.
What changed
The Ministry of Economy concluded investigation AD 30-24 after finding dumping and material injury. Its final operative paragraph imposes 0.1488 USD/kg on Chinese-origin ammonium sulfate regardless of the country from which it is shipped, under TIGIE 3102.21.01 or any other line.
The product description identifies ammonium sulfate fertilizer; the investigation examined standard and granular presentations. Hacienda applies the duty. The resolution was published on 14 August 2026 and expressly enters into force the following day, 15 August.
Importers who prove a non-Chinese origin under the cited agreement do not owe this antidumping duty.
Immediate checks
- Identify ammonium sulfate fertilizer in standard or granular form and verify origin; review entries under 3102.21.01 or any other tariff line, including shipments routed through another country.
- For covered Chinese-origin imports from 15 August 2026, calculate final antidumping exposure at 0.1488 USD/kg and confirm payment treatment with the Mexican customs broker.
- If claiming non-Chinese origin, retain the documentation required by the cited non-preferential origin agreement and validate it before entry.