The invention relates to a temperature-stable solution consisting ofa) 0.1-10% by weight of at least one hexamidine salt,b) 40-95% by weight of an alkanediol having a C3 to C5 carbon chain and a ClogP of −0.2 to −1.1,c) 5-60% by weight of water andd) one or more additives to adjust the pH of the solution to 3.0 to 6.0 inclusive, wherein the total amount of components a) to d) is 100% by weight.