There are (at least) two very clear and very different sets of EU regulations regarding fragranced products. One which is concerned with cosmetic and skin scents, the other to do with Household and Detergent Perfumery. Sometimes the rules overlap (labelling of allergens on everything except Airfresheners) and sometimes they don't. It may well be that the flammability is an issue, although I have worked with customers who wanted to use alcohol, and indeed used Butane in their aerosols (and had to label the product as flammable). Whatever the reason Ethanol is very flammable. DPG isn't, but it isn't particularly volatile either. I don't know what system you are working with Mumsy, but I'm sure you could get away with using DPG (regarded as non-hazardous) or possibly Carbitol, although some customers don't like using Carbitol as it is very drying to the skin. This application, shouldn't be a problem.