Active ingredient: Imazalil (imidazole) 500 g/ℓ. Reg. No. L9798.

All products should have their active ingredients listed on the packaging or container they come in. The packaging also shows how much of the active ingredient is in that particular formulation. This is the strength of the formula. Some products can have the same brand name, but come in different strengths of an active ingredient, so they can be used for different conditions.