Rasagiline salt with an acid, characterized in that the salt is liquid at 23 ° C, in which the acid has the general formula R-COOH and R is a saturated or unsaturated, branched or unbranched C2-C23 alkylSal de rasagilina con un ácido, caracterizada porque la sal es líquida a 23ºC, en la que el ácido tiene la fórmula general R-COOH y R es un alquilo C2-C23 saturado o insaturado, ramificado o no ramificado