dense smoke is produce when product burns. violent steam generation or eruption may occur upon application of direct water steam. vapors are heavier than air and may travel a long distance and accumulate in law areas. ignition and/or flash back may occur. flammable mixtures may exist within the vapor space of containers at room temperature. flammable concentration of vapor can accumulate at temperatures above 74. spills of these organic liquid on hot fibrous insulations may lead to lowering of the auto-ignition temperatures possibly resulting in spontaneous combustion.