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Methanol Freeze Protected Heat Transfer Liquids

Freezing and flash points for methanol or methyl based heat-transfer fluids or brines.

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Freezing Point of Methanol based Water Solutions

Freezing Point
Methanol Concentration
by mass0102030405060708090100
by volume0132435465666758392100
Temperature oF 32 20 0 -15 -40 -65 -95 -115 -125 -130 -144
oC 0 -7 -18 -26 -40 -54 -71 -82 -87 -90 -98

Flash Points of Methanol based Water Solutions

The flash point of a chemical is the lowest temperature where it will evaporate enough fluid to form a combustible concentration of gas. The flash point is an indication of how easy a chemical may burn.

Flash Point
Methanol Concentration
by mass0102030405060708090100
by volume0132435465666758392100
Temperature oF - 130 110 95 85 75 70 60 54 54 54
oC - 54 43 35 29 24 21 16 12 12 12


  • HIGH flammability if pure
  • HIGH toxicity

Alternatives to Methanol based Water Solutions

Physical Properties of Methanol

  • Molecular Weight : 32.04
  • Boiling Point : 64.7 oC
  • Melting Point : -97.8 oC
  • Flash Point : 12 oC (54 oF) closed cup
  • Auto ignition Temperature : 878 oF
  • Vapor Pressure : 92 mm Hg at 20 oC
  • Density/Specific Gravity : 0.7915 at 20/4 oC (water = 1)
  • Vapor Density : 1.11 (air = 1)
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  • Engineering ToolBox, (2005). Methanol Freeze Protected Heat Transfer Liquids. [online] Available at: [Accessed Day Mo. Year].

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