Chemically, how does Propylene Glycol bond with water molecules to achieve its freezing point depression effect?

Answer

Through hydrogen bonding.

As a diol, PG has two hydroxyl groups that allow it to bond readily with water molecules through hydrogen bonding, effectively tying up the water and inhibiting crystallization.

Chemically, how does Propylene Glycol bond with water molecules to achieve its freezing point depression effect?

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