Source : Webster's Revised Unabridged Dictionary (1913)

Vaporizable \Vap"o*ri`za*ble\ (?; 110), a.
   Capable of being vaporized into vapor.

Source : WordNet®

vaporizable
     adj : used of substances [syn: {evaporable}, {vaporific}, {volatilizable},
            {volatilisable}]