Abstract: An antifreeze composition comprising one or more metal chlorides, in particular, calcium chloride and magnesium chloride, and a solution having an alkaline pH in which at least one of the following ions is dissolved: Bromide (Br?), Bicarbonate (HCO3?), Borate (BO33?), Silicate (SiO3?), Fluoride (F?), Iodine (I?). this composition is capable of providing an effective antifreeze action, for example on roads, airstrips and vehicle windows, also in conditions of extremely cool temperatures. In fact, the composition remains in the liquid state even at very low temperature reducing, in particular, the environmental impact with respect to the solutions of prior art. This is possible because the interaction existing between a metal bivalent ion 10, such as Ca2+, or Mg2+, and a chloride ion (Cl?) 20, in the antifreeze composition brings the ions at a high balancing distance “R”. This is due to the presence of at least one weak ion 15, for example Bicarbonate (HCO3?), Borate (BO33?), Iodine (I?), Fluoride (F?), etc.