Is Methanol miscible with n-Hexane?
Compiled by Hemant RawatLast reviewed July 2026How we verify
Partially miscible
Partially — Methanol and n-Hexane mix only over a limited composition range. Outside that range they separate into two layers, so the ratio and temperature matter.
Why
Methanol (polarity index 5.1, polar protic) and n-Hexane (polarity index 0.1, nonpolar) 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 Methanol and n-Hexane.
General guidance for method development — miscibility varies with temperature, water content and proportions. Confirm critical mixtures at your working conditions. See ourmethodology.