1,1-Dimethyloxirane (also known as isobutylene oxide) is a highly reactive epoxide compound used as a key intermediate in organic synthesis and polymer chemistry. This volatile liquid has a boiling point of 50-51°C (lit.), density of 0.812 g/mL at 25°C, and refractive index of 1.374 (n20/D). It is soluble in common organic solvents (58 g/L in water at 20°C) and should be stored under inert atmosphere due to its sensitivity to moisture and acids. The compound is widely employed in polyether production, pharmaceutical synthesis, and as a precursor for specialty chemicals. Safety precautions are essential as it is flammable (Flash point 33°F) and may cause skin/eye irritation (GHS Category 2).
