Antifrogen^® N is a light yellow coloured liquid which is used as a heat transfer medium, e.g. in closed heat pump systems, in hot water heating systems and as a cooling brine in technical cooling systems. The product is inhibited free of nitrite, amine, borate, silicate and phosphate. Antifrogen^® N is not suitable for food-related or pharmaceutical applications. The use of Antifrogen^® L is recommended here.

* Taking into account the increased kinematic viscosity, even lower application temperatures are possible

Frost protection and application concentration:Frost protection depends on the mixing ratio with water. The minimum concentration of Antifrogen^® N is 20 % by volume. The frost resistance of the mixture does not change - assuming a constant Antifrogen^® N concentration - even after many years of operation. Homogeneous mixtures of Antifrogen^® N and water also do not separate. Antifrogen^® N must always be diluted with water. The water used to dilute Antifrogen^® N should not contain more than 100 mg/kg (ppm) chloride. This is particularly important if systems contain components made of aluminium or aluminium alloys. The water hardness can lie in a wide range between 0 and 25° dH. This means that drinking water can be used in addition to fully demineralised (deionised, distilled) water. Experience has shown that the good anti-corrosive properties of Antifrogen^® N water mixtures decrease with increasing water content. The Antifrogen^® N content in a cooling brine or heating fluid must therefore not be less than 20 % by volume. This corresponds to a -9 to -10 °C frost-proof solution. Below this concentration, microorganisms can grow in the brine, which can lead to organic deposits and microbially induced corrosion.