Australia Launches Anti-Circumvention Trade Probe into China’s 2,4-D Supply Chain

January 9, 2026 — The Australian agricultural trade landscape is once again at the center of international scrutiny as authorities initiated a formal anti-circumvention investigation concerning imports of the widely used herbicide 2,4-D from China. 

The Anti-Dumping Commission of Australia issued Announcement No. 2026/001 in early January 2026, following a petition by local crop protection manufacturer Nufarm Limited, alleging that certain imports of 2,4-D and its derivatives had circumvented existing anti-dumping duties through processing or re-export via Malaysia, thereby undermining tariff safeguards instituted as far back as 2003. 

The scope of the investigation covers not only the base acid but also its sodium salts, esters such as ethyl and isobutyl esters, and formulated end products shipped to the Australian market. Such products have traditionally been subject to anti-dumping duties ranging from approximately 5% to above 35%, depending on exporter and product classification. 

According to the official notice, the accused practices include alleged third-country assembly — specifically claims that Malaysian facilities owned or controlled by Malaysian producer Kenso Corporation used imported Chinese intermediates to conduct local esterification or formulation before exporting to Australia — and that some shipments may have been declared as Malaysian origin to evade duties. 

Australia’s investigative timeline is strict: preliminary fact-finding must be completed by late April 2026, with a comprehensive report due to the Minister for Industry and Science by mid-June. Failure to comply could lead to reinforced or extended duties and significantly impact trade flows for one of the agriculture sector’s most broadly used herbicides. 

Trade experts say the case underscores the ongoing tensions in global agrochemical markets, where tariffs, compliance, and sourcing strategies remain key battlegrounds. China’s export strength in herbicidal chemicals, coupled with evolving regional supply chains, shows once again how trade defense tools are being redeployed in response to perceived regulatory circumvention.