Nitrous Oxide (N2O) may very well be used being an oxidizer in rocket engines. Nitrous Oxide has key strengths about other oxidizers in that it is significantly less toxic, and due to its security at space temperature is also simpler to store and comparatively safe to hold with a flight. https://fast-gas35567.mybuzzblog.com/15314501/how-much-you-need-to-expect-you-ll-pay-for-a-good-nitrous-oxide