Raman spectra in 800-3 000 cm-1 of 1-pentanol were studied under high pressure and at ambient temperature (23 ℃) using a cubic zirconia anvil cell. The Raman peaks become sharper at higher pressure so that each individual C—H stretching mode is difficult to be distinguished. The Raman frequencies of the C—H stretching modes shift to a higher position with increasing pressures ranging between 0.1 MPa and 1.75 GPa. And the pressure induced frequency shifts are described by P(MPa)=69.652 65·(Δνp)single, T=23 ℃ +105.806 93 where 0＜(Δνp)single(cm-1)≤23 and P(MPa)=77.974 04·(Δνp)2 960, T=23 ℃+95.390 5 where 0<(Δνp)2 960(cm-1)≤21 and P(MPa)=126.956 39·(Δνp)2 863, T=23 ℃－110.648 09 where 0<(Δνp)2 863(cm-1)≤13, respectively. The global slope is (νsingle/P)T(14±1)cm-1·GPa-1, which can be used as a pressure sensor. Both the jumping of the frequencies and the figure under microscope indicate that the frozen pressure of the 1-pentanol at room temperature is 1.75 GPa. The molar volume change of the 1-pentanol is ΔVm=1.84×10－6 m3·mol-1 in the phase transformation from a liquid to a solid at 23 ℃.