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Constitutions and physical properties of water, propylene glycol, and polyethylene glycol aqueous solutions (temperature: 37.0 °C)
| Number of samples | Water | Propylene glycol | Silicon oil | Density (g/ml) | Speed of sound (m/s) |
|---|---|---|---|---|---|
| 1 | 100 | 0 | 0 | 0.99 | 1508 |
| 2 | 90 | 1 | 9 | 0.986 | 1500 |
| 3 | 85 | 1 | 14 | 0.98 | 1497 |
| 4 | 80 | 1 | 19 | 0.975 | 1493 |
| 5 | 70 | 1 | 29 | 0.97 | 1485 |
| 6 | 60 | 1 | 39 | 0.968 | 1478 |
| 7 | 50 | 1 | 49 | 0.96 | 1470 |
