Propylene glycol vs ethylene glycol in antifreeze
The primary difference between propylene glycol and ethylene glycol are the toxicity and heat transfer characteristics.
Ethylene glycol (EG), also referred to as mono ethylene glycol (MEG), provides excellent heat transfer and is commonly used in applications where efficiency is important and toxicity is not a concern, such as injection moulding, autoclaves and transformer cooling. It's also the predominant fluid used for automotive antifreeze formulations.
Propylene glycol (PG), also referred to as mono propylene glycol (MPG), is used in food and beverage processing, cosmetics, pharmaceutical production and anywhere there is a risk of human or animal exposure.
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