Ethylene Glycol Freezing Point Measurement

Ethylene glycol is the main component of antifreeze, accounting for about 45% of the antifreeze stock. The antifreeze stock can be mixed with water in a certain proportion according to the temperature of each place to control the freezing point within an appropriate range. Effective antifreeze agents are various organic alcohols.
Since the 1950s, almost all countries have adopted ethylene glycol as antifreeze. Ethylene glycol is a colorless, transparent, slightly sweet and hygroscopic viscous liquid that can be dissolved in water in any proportion. The freezing point is different when the concentration of ethylene glycol is different. The freezing point of ethylene glycol-water antifreeze is not linearly related to the mass fraction of ethylene glycol. The freezing point of its aqueous solution does not completely decrease with the increase of concentration. When the concentration exceeds 70%, the freezing point rises instead. In the preparation process, a reasonable choice should be made based on actual conditions to achieve the requirements of antifreeze and economy. In Jiangnan, China, a ratio of 40% ethylene glycol mass fraction is generally used, while in the cold north, a ratio of about 50% ethylene glycol mass fraction is more appropriate.