Methanol-water mixtures, freezing point

Dielectric Constant and Freezing Point of Methanol—Water Mixture ... 

Table 3.5. Freezing point of methanol-water mixtures...

Methanol has a high freezing point depression ability. It depresses the freezing point of water by 54.5°C for a 5050 wt% methanol-water mixture [46]. The... 

Ethylene glycol is not as active in depression of the freezing point as methanol, but it has a very low vapor pressure evaporation loss in a coolant system is due more to the evaporation of water than to the evaporazation of ethylene glycol. Furthermore, the flammability problem is literally eliminated. 1 1 mixtures of ethylene glycol and water do not exhibit a flash point at all. 

Antifreeze. Any compound or mixture that lowers the freeing point of water can be referred to as antifreeze. The preponderant, commercial antifreeze is ethylene glycol diluted with water. Other organic compounds used occasionally are methanol, ethanol, and propylene glycol. The primary application is to protect automotive cooling systems from freezing. 

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