ASTM D1982 Titer of Fatty Acids
Biodegradable fatty acids may be incorporated into lubricants and metal working fluids as corrosion inhibitors and lubricity additives. However, the use of saturated fatty acids for low temperature applications is often limited because they solidify at relatively high temperatures compared to unsaturated fatty acids. This test determines the titer point (solidification temperature) of fatty acids and fatty acid mixtures.
The sample is placed in a test tube, dried and heated. It is then cooled with constant stirring while monitoring the temperature. The titer point is observed and reported in °C at the solidification point of the sample.