Ingredient Index

Is Tricyclazole banned in Europe?

Banned in EU

Yes. The EU did not approve tricyclazole, a rice fungicide, after its cancer and genotoxicity assessment came back inconclusive. The US allows it on rice, including via import tolerances.

CAS: 41814-78-2 Also seen as: Tricyclazole, Beam

What the EU does

Not approved. Commission Implementing Regulation (EU) 2016/1826 confirmed the non-approval of tricyclazole. EFSA had concluded that the assessment of its genotoxic and carcinogenic potential was inconclusive, so the reference values needed to judge safety for consumers, workers, and bystanders could not be set. Without those, the risk could not be signed off.

The rice angle matters here: tricyclazole is a blast fungicide used on paddy rice, so the practical effect in the EU has been tighter maximum residue levels on rice, including imported rice, rather than European farms using the product.

Citation Commission Implementing Reg (EU) 2016/1826 (non-approval of tricyclazole); Reg (EC) No 1107/2009; EFSA conclusion on tricyclazole

What the US does

Allowed on rice. Tricyclazole is used as a rice fungicide, and the US has handled it through tolerances that permit residues on rice, including rice imported from countries where the product is applied. EFSA itself has assessed import tolerance requests tied to trade in treated rice.

So the divergence is about a staple grain: Europe set strict residue limits after declining to approve the substance, while it stays in use on rice destined for or grown in the US market.

Citation US tolerances for tricyclazole on rice (40 CFR 180 series); EFSA reasoned opinion on import tolerance for tricyclazole in rice (2023)

Products that commonly contain it

Tricyclazole is a rice fungicide, so it sits behind grain rather than on labels:

Rice grown with blast-fungus control programs
Imported rice from regions where tricyclazole is used
Rice-based products made from treated grain
EU rice imports, held to strict residue limits

What to look for on a label

You cannot read tricyclazole off a rice package; it is a residue question:

Organic rice is grown without synthetic fungicides like tricyclazole
Country of origin can hint at different residue regimes
In the EU, strict maximum residue levels do the work the non-approval implies

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Frequently asked questions

Is tricyclazole banned in Europe?

Yes, in effect. The EU did not approve it in 2016 after an inconclusive cancer and genotoxicity assessment, so it cannot be used on EU crops.

What is tricyclazole used on?

It is a fungicide used to control rice blast disease on paddy rice.

How does it affect imported rice?

The EU applies strict maximum residue levels to rice, including imports, after declining to approve the substance.

Related ingredients

Primary sources

Last reviewed August 25, 2026 · How we assign statuses