E940 – Dichlorodifluormethane
PropellantDescription
Synthetic chlorofluorocarbon produced by reacting carbon tetrachloride with anhydrous hydrogen fluoride
Notes
Dichlorodifluoromethane is a synthetic chemical compound made up of carbon, hydrogen, chlorine, and fluorine atoms arranged in a specific pattern. It belongs to a family of chemicals called chlorofluorocarbons (CFCs), which are created in specialized chemical plants through reactions between methane (natural gas) and various halogen compounds. The process involves replacing some of the hydrogen atoms in methane with chlorine and fluorine atoms under controlled industrial conditions. This compound functions as a propellant in food packaging, meaning it creates the pressure needed to spray products out of aerosol containers. You might encounter it in whipped cream dispensers, cooking spray cans, or other pressurized food products where a fine, even spray is desired. When you press the nozzle on these products, the dichlorodifluoromethane expands rapidly, pushing the food product out in the form you want. As a fully synthetic chemical, this additive is suitable for vegetarians, vegans, and doesn't conflict with religious dietary restrictions since it contains no animal or plant-derived ingredients. However, it's worth noting that CFCs like this one have raised environmental concerns due to their potential impact on the ozone layer, leading to increased regulation and replacement with more environmentally friendly alternatives in many applications. The food industry has been transitioning away from CFC propellants in favor of more sustainable options.