Impact of low flash point compounds (hydrocarbons containing eight carbon atoms) on the flash point of jet fuel and n-dodecane

•Flash points of eight carbon compounds in dodecane and JP-5.•Ideal and non-ideal solution behavior predicts dodecane mixture flash points.•Ideal and non-ideal solution behavior used to select some pure component flash points.•n-Dodecane mixtures flash points fit using Blending Index correlations.•Blending Index correlations based on dodecane predict JP-5 mixture flash points.