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OO-tert-butyl-O-(2-ethylhexyl) monoperoxycarbonate is a liquid organic peroxide, Type D (determined by UN test method), with a SADT (Self-Accelerating Decomposition Temperature) of 65 °C. The substance has a very low melting point (<-90 °C); the boiling point (extrapolated value is 152 °C) and the flash point (100 °C) are greater than SADT. The relative density at 20 °C is close to water (0.9271), and log Kow at 25 °C is 5.20. The vapor pressure is less than 0.01 Pa (not volatile).