Antifrogen KF fulfills a dual function as a refrigerating medium. It ensures that the aqueous solution remains liquid at the required brine temperature and protects the metals in the system from corrosion.
The freezing point of the undiluted brine is about -53 °C, and the brine has a strong tendency to supercool. Supersaturated solutions can however be induced to crystallize out by inoculation.
The values shown in the „freezing point“ curve were obtained by this means, and so they provide a reliable guide to the lowest possible temperature in the refrigeration system. Experience indicates that the brine temperatures obtainable in practice in this way are 8-4 °C higher.
To prevent precipitation, only fully dionized (distilled) water may be used for diluting Antifrogen KF. All in the table mentioned materials are protected against corrosion in dilution up to 51 % V/V (= -20 °C). In further dilution with water up to 31 % V/V (= -10 °C) it is recommended to use stainless steel or copper instead of ferrous metals.
It must not be mixed with other brines, especially with chloride brines but also with glycol brines (e.g. Antifrogen N or L).