CAS Number: 78-85-3 Molecular Formula: C4H6O Molecular Weight: 70.09 g/mol Appearance: Colorless to pale yellow liquid with a strong pungent odor Boiling Point: 69 °C Density: 0.85 g/mL at 25 °C Usage: Used in the manufacture of copolymers and resins, as well as a raw material for methacrylic acid …