Aqueous solution of propylene glycol – aqueous solution of coolant and antifreeze for heating and cooling systems
Dependence of propylene glycol concentration on the freezing point of aqueous solution (onset of crystallization). Solution density values at 20 ° C.
| Propylene Glycol Solution % | Freezing point (onset of crystallization), t°C | Density 20°C |
|---|
| 31% | -15°C | 1,023 |
| 35% | -20°C | 1,028 |
| 41% | -25°C | 1,032 |
| 45% | -30°C | 1,035 |
| 50% | -35°C | 1,038 |
| 55% | -45°C | 1,040 |
| 60% | -55°C | 1,042 |
| 65% | -57°C | 1,043 |
| 70% | -58°C | 1,044 |
