Vapor-liquid equilibrium data are reported for the binary systems ethanol-nitromethane (MeNO₂) and ethanol-diethylamine (Et₂NH) at 730mmHg. As expected from a strong hydrogen-bond interaction between hydroxyl group and amino base, the ethanol-Et₂NM system shows negative deviation from the ideal solution law and no azeotrope can be found. The ethanol-MeNO₂ system shows a positive deviation. MeNO₂ forms an azeotrope at 76.4°C and 75.0 mole % of ethanol. Based on these results and other activity coefficient data available, the prediction of azeotrope formation in binary ethanol solutions by the previously presented correlation and azeotrope diagram is discussed.