It may be used as an oxidizing agent in rocket propulsion systems.
Resulting mixture is greenish blue, while dinitrogen tetroxide is colorless or brownish yellow.
Liquid phase of MON contains no nitric oxide.
The addition of nitric oxide also reduces the freezing point to a more desirable temperature.
The freezing point of pure nitrogen tetroxide is −9 °C (16 °F), while MON3 is −15 °C (5 °F) and MON25 is −55 °C (−67 °F).