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Piperonal is a solid, with a melting point of 36.5°C and a boiling point of 272°C at 98.5 kPa. The vapour pressure of Piperonal is 2 Pa at 20°C. Piperonal is soluble in water, and has an n-octanol water partition coefficient (log Kow) of 1.2. Piperonal is denser than water with a reported density of 1.4195 g/cm3 at 20°C. Piperonal is non-flammable, with an autoignition temperature of >400°C, and it is not classified for physical hazards. Piperonal is a powder with a reported median particle size L50 = 272µm.