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The most common water-based antifreeze solutions used in electronics cooling are mixtures of water and either ethylene glycol (EGW) or propylene glycol (PGW). The use of ethylene glycol has a longer history, especially in the automotive industry.
Tetraethylene Glycol (TETRA EG) features a higher boiling point and lower volatility than the lower ethylene glycols. It is completely miscible with water and a wide range of organic solvents, but has only a very slight affinity for certain aliphatic hydrocarbons.etraethylene Glycol (TETRA EG) features a higher boiling point and lower volatility than the lower ethylene glycols. It is completely miscible with water and a wide range of organic solvents, but has only a very slight affinity for certain aliphatic hydrocarbons.