A mathematical model that may be used for predicting the flash point of multiple component solutions has been proposed, and is shown to be adequate for some specified systems, such as ternary solutions. The ternary solutions, methanol + methyl acetate + methyl acrylate and methanol + ethanol + acetone, were used to validate this proposed model. The model is able to precisely predict the flash point over the entire composition range of such ternary solutions by utilizing the flash point of the individual components. If the binary parameters for a ternary solution are not accessible, a model based upon the binary parameters of binary solutions may provide a very acceptable means of predicting flash point for the ternary solution as revealed by a comparison between predicted and experimental data.