Is Water miscible with Ethyl acetate?
Compiled by Hemant RawatLast reviewed July 2026How we verify
Partially miscible
Partially — Water and Ethyl acetate mix only over a limited composition range. Outside that range they separate into two layers, so the ratio and temperature matter.
Why
Water (polarity index 10.2, water) and Ethyl acetate (polarity index 4.4, low polarity) sit far enough apart in polarity that they mix only up to a point. Small additions dissolve, but beyond a threshold a second layer appears — a common surprise when switching between reversed-phase and normal-phase solvents.
What it means for your method
For a single-phase mobile phase, keep the minor solvent below its miscibility limit, or add a co-solvent to bridge the gap. Always confirm the exact mixture at your working temperature.
Check any other pair on the interactive miscibility chart, or see full properties for Water and Ethyl acetate.
General guidance for method development — miscibility varies with temperature, water content and proportions. Confirm critical mixtures at your working conditions. See ourmethodology.