a method for delivering a gas having a proton affinity of less than 866 kj / mol is disclosed . a support including at least one polymer sufficiently acidic to protonate the gas is contacted with the gas to protonate the gas . the protonated gas condenses to form a solid salt which is sorbed by the support . the gas is dispensed by deprotonating the sorbed solid salt to regenerate said gas . the at least one polymer of the support has a first hammett acidity value greater than a second hammett acidity value of a conjugate acid of the gas . also provided is an apparatus for performing the method . the invention is especially useful for storing , transporting and delivering hazardous gases , such as arsine and phosphine . the polymer can be polymeric sulfonic acids , polymeric perfluoroalkylsulfonic acids , fluorinated sulfonic acid polymers , cross - linked sulfonated polystyrene - divinylbenzene macroreticular copolymers , carboxylic acid polymers , halogenated carboxylic acid functionalized polymers and mixtures thereof .