nitrogen tetroxide

noun Chemistry.

1. a poisonous compound, N2O4, occurring as a colorless, water-soluble solid or liquid, dissociating into NO2: used chiefly as an oxidizer, especially in rocket fuels, as a nitrating agent, and as an intermediate in the manufacture of nitric acid.

noun

1. another name for dinitrogen tetroxide
2. a brown liquefied mixture of nitrogen dioxide and dinitrogen tetroxide, used as a nitrating, bleaching, and oxidizing agent