I was reading similar question as mine here. But no one talked about Nitrogen Dioxide (NO2). Its boiling point is 21C. So easy to store. But how easy it is to handle compared to Hydrogen Peroxide or other oxidizers?

Is there any better Liquid oxidizers that amateur rocketeers can use? At least, combination oxidizers or chemical stabilizers?

I'm kind of dying inside knowing there is no near safe liquid oxidizer for Amateur Rocketeers.

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    $\begingroup$ Protip: nearly all rocket grade liquid oxidizers will very handily oxidize you, killing you dead. $\endgroup$ – Tristan Apr 13 '19 at 3:36

Not a good idea for amateurs; it can kill you without you realizing you're dying:

10–20 ppm can cause mild irritation of the nose and throat, 25–50 ppm can cause edema leading to bronchitis or pneumonia, and levels above 100 ppm can cause death due to asphyxiation from fluid in the lungs. There are often no symptoms at the time of exposure other than transient cough, fatigue or nausea, but over hours inflammation in the lungs causes edema.


Nitrogen Dioxide is a chemical that forms an equilibrium with Dinitrogen Tetroxide, which in the world of rocketry is often just called "Nitrogen Tetroxide" so as to increase the amount of confusion. If you have a tank of one, it will change between being one or the other based on temperature or pressure.

This is one of the commonly used hypergolic storable oxidizers, and, like all commonly used hypergolic storable chemical propellants, it's quite dangerous and probably not suitable for the amateur. Specifically, it's quite deadly if inhaled.

Nitrous oxide, N2O, is much safer and liquefies under pressure similar to propane, and is commercially available due to its use in the whipped cream and motorsports industries. However, it has lousy performance and is not hypergolic with typical fuels. Additionally, it definitely can explode under the right cirucmstances. See this presentation.


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