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Fluids / Propylene glycol, 40 % by volume

Dynamic viscosity of propylene glycol, 40 % by volume vs temperature

A 40 % by volume propylene glycol solution, freeze protection to about −21 °C — the middle charge — full winter protection at a manageable pumping penalty.

Dynamic viscosity in mPa·s, from -20 to 100 °C. The chart and the table below are the same numbers; the table is the one you can copy.

Dynamic viscosity mPa·s (log scale)
Dynamic viscosity of propylene glycol, 40 % by volume in mPa·s, from -20 to 100 °C-20 °C — 48.9 mPa·s-15 °C — 33.07 mPa·s-10 °C — 23.11 mPa·s-5 °C — 16.63 mPa·s0 °C — 12.3 mPa·s5 °C — 9.32 mPa·s10 °C — 7.21 mPa·s15 °C — 5.7 mPa·s20 °C — 4.59 mPa·s25 °C — 3.75 mPa·s30 °C — 3.12 mPa·s35 °C — 2.62 mPa·s40 °C — 2.24 mPa·s45 °C — 1.93 mPa·s50 °C — 1.68 mPa·s55 °C — 1.48 mPa·s60 °C — 1.31 mPa·s65 °C — 1.18 mPa·s70 °C — 1.06 mPa·s75 °C — 0.96 mPa·s80 °C — 0.88 mPa·s85 °C — 0.81 mPa·s90 °C — 0.75 mPa·s95 °C — 0.69 mPa·s100 °C — 0.65 mPa·s110-20-100102030405060708090100Temperature (°C)Dynamic viscosity (mPa·s (log scale))
Propylene glycol, 40 % by volume — everything else at 20 °C (default)
Density1,037.4 kg/m³
Specific heat3.702 kJ/(kg·K)
Thermal conductivity0.384 W/(m·K)
Dynamic viscosity by temperature
Temperature (°C)Dynamic viscosity (mPa·s)Row
-2048.9published
-1023.11published
012.3published
107.21published
204.59published
303.12published
402.24published
501.68published
601.31published
701.06published
800.88published
900.75published
1000.65published

Rows marked published land exactly on a source anchor and are the tabulated figure. The rest are this library’s interpolation between the two anchors either side — good enough to design with, and said out loud so you can decide that for yourself.

Dow, Engineering and Operating Guide for DOWFROST and DOWFROST HD, SI tables, by volume; typical values for inhibited product · validated -20 to 100 °C · interpolated between 25 published anchors (values held, not extrapolated, past the ends)

← Propylene glycol, 40 % by volume: every property at one temperature

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