Equilibrium conditions of propane hydrates in aqueous solutions of methanol, ethanol, ethylene glycol, diethylene glycol, triethylene glycol, and glycerol were measured at temperatures of (267.5 to 278.1) K and pressures of up to 0.527 MPa by the use of both isochoric and isothermal methods. The inhibiting effect on the propane hydrate equilibria on a mass fraction basis decreased in the following order: methanol, ethanol, ethylene glycol, glycerol, diethylene glycol, and triethylene glycol.