gas molecular entity dinitrogen oxide Codex::942 Europe::942 A nitrogen oxide consisting of linear unsymmetrical molecules with formula N2O. While it is the most used gaseous anaesthetic in the world, its major commercial use, due to its solubility under pressure in vegetable fats combined with its non-toxicity in low concentrations, is as an aerosol spray propellant and aerating agent for canisters of 'whipped' cream. LanguaL term definition: Food additive; technological purpose(s): antioxidant, foaming agent, packaging gas, propellant. nitrous oxide nitrogen oxide