O 1236 (OTTO) n-Octane, GR 99%+ Cas 111-65-9 - used as a solvent, fuel and as one of the standard values in octane rating scale. It is also used to prevent uneven burning of fuel in internal-combustion engines. Further, it acts as an antiknock agent for high compression engine fuels, lacquer diluents, blowing agent for foam rubber. O 1236 (OTTO) n-Octane, GR 99%+ Cas 111-65-9 - used in rocket propellants and in azeotropic distillations.