Definition: Processing aid
Any substance which:
(i) is not consumed as a food by itself;
(ii) is intentionally used in the processing of raw materials, foods or their ingredients, to fulfil a certain technological purpose during treatment or processing; and
(iii) may result in the unintentional but technically unavoidable presence in the final product of residues of the substance or its derivatives provided they do not present any health risk and do not have any technological effect on the final product.
European Union, Regulation (EC) No 1333/2008 of the European Parliament and of the Council of 16 December 2008 on food additives (Official Journal of the European Union No L 354, 31.12.2008)