Overview of Antifreeze Chemicals

Some data concerning the activity of antifreeze chemicals are presented in Table 14-1. Inspection of Table 14-1 shows that there are two different types of antifreeze chemicals, that is, liquids that are miscible over the full range of concentration with water and salts, often salts which are soluble only to a certain amount. In the case of liquids, a mixture of 50% by weight with water is given. In the case of solids, the ethylene glycol forms with water an 

Component Concentration in water (% by wt) Depression of freezing point (° C) 

The depression of freezing point is dependent on concentration. A mixture of glycol in water will lower the freezing point with an increasing amount of ethylene glycol, as given in Table 14-2. 

Depression of the Freezing Point in a Mixture of Ethylene glycol-Water 

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