Methylcyclopentadienyl-manganese-tricarbonyl (MMT) is a metallic additive which is added to fuel for motor vehicles.
By the rules at issue the European Union has introduced strict limits for the use of MMT and labelling requirements for metallic additives, in the light of fears that they are a danger to human health and damage emission control systems in vehicles.
The largest producer of MMT considers those fears to be clearly unfounded, it therefore takes the view that the rules breach various principles of European Union law, in particular, the precautionary principle, the principle of proportionality and the principle of equality.
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