A pharmaceutical aerosol formulation comprising a particulate medicament, one or more fluorocarbon or hydrogen-containing fluorocarbon propellants and a compound of the general formula (I) or a salt or solvate thereof, wherein A represents a straight chain C1-16 alkylene substituted by n groups of formula B; n represents an integer 1 to 3; and B independently represents C1-4 fluoroalkylC0-6 alkylene-, C1-4 fluoroalkylC0-6 alkylene-Onull, or C1-4 alkylC0-6 alkylene-Onull wherein at least one substituent of formula B contains at least one fluorine atom and each C1-4 fluoroalkyl- moiety contains one or more fluorine atoms but not more than 3 consecutive perfluorinated carbon atoms. The invention also extends to uses of compounds of formula (I) and certain novel compounds within the definition of formula (I). 1