Chemical Compound Diethylene glycol is an organic compound with the formula (HOCH2CH2)2O. It is a colorless, practically odorless, poisonous, and hygroscopic liquid with a sweetish taste. It is miscible in water, alcohol, ether, acetone, and ethylene glycol. Formula: C4H10O3 Density: 1.12 g/cm³ Molar mass: 106.12 g/mol