Antifrogen® KF

Safety

To prevent precipitation, only fully dionized (distilled) water may be used for diluting Antifrogen KF to give the desired protection against freezing (at least -10 °C).
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.

Antifrogen KF has neither a flash point nor a fire point.
The results of ecotoxicological studies demonstrate the good biodegradability and toxicological safety of Antifrogen KF.
Since soft solder is not resistant to Antifrogen KF, we recommend the use of hard solder joints in assembling systems. Galvanized lines must not be used because zinc is dissolved.

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Technical Data

Density at 20°C (DIN 51757)		g/cm³	1.343
Refractive index nD at 20°C (DIN 51423, Part 2)			1.387
pH-Value undiluted (DIN 51369)			11
Boiling point at 1013mbar		°C	+115
Freezing point (ASTM D 1177)		°C	approx. -60
Pour point (DIN 51597)		°C	below -60
Kinematic viscosity (DIN 51562)	20°C -40°C	mm2/s	2-3 approx. 25
Specific heat	20°C -40°C	kJ/kgK	approx. 2.6 approx. 2.5
Thermal conductivity	20°C -40°C	W/mK	approx. 0.46 approx. 0.39
Specific electrical conductivity	20°C	mS/cm	220-230

Application

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).

Handling

SERVICE & MONITORING
The Antifrogen KF concentration should be checked once a year. It is also advisable to check the degree of protection against freezing when Antifrogen KF or water has been replenished. A sample should also be taken for checking the serviceability and corrosion inhibition.

DISPATCH & STORAGE
Antifrogen KF is delivered in road tankers, rail tank wagons and non-returnable drums (280 kg). The product has good storage stability.
Remarks: Very slight turbidity with brown precipitations can occasionally be observed dependent on the quality of raw materials. However, this has no negative effect on the product performance.