The REACH Regulation refers to alloys as “special mixtures” (Recital (31), Annex I (0.11.), as amended by Regulation (EC) No 1272/2008). Therefore, an alloy is to be treated in the same way as other mixtures under REACH, which means that the alloy as such is not subject to registration but the alloying elements (e.g. metals), irrespectively of the production process of the alloy are. However, components which are not important for the properties of the alloy should be considered as impurities (i.e. they are part of a substance in the mixture) and therefore need not be registered separately. Please note that intermetallic compounds are often wrongly regarded as alloys, although they have a well defined stoichiometry. Such substances are listed in EINECS (e.g. “aluminium, compound with iron (1:1)”, “iron, compound with titanium (2:1)”, etc.) and cannot be regarded as mixtures, therefore these intermetallic compounds have to be registered as such. This means that e.g. separate (pre-)registrations of the substances Al and Fe do not cover the substances “aluminium, compound with iron (1:1)” or “aluminium, compound with iron (1:3)”. For each intermetallic compound with a different metal ratio a separate (pre-)registration is required.