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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 | 0.998 | 1508 |
| 2 | 90 | 5 | 5 | 0.996 | 1500 |
| 3 | 85 | 7.5 | 7.5 | 0.994 | 1497 |
| 4 | 80 | 10 | 10 | 0.993 | 1493 |
| 5 | 70 | 15 | 15 | 0.991 | 1485 |
| 6 | 60 | 20 | 20 | 0.988 | 1478 |
| 7 | 50 | 25 | 25 | 0.986 | 1470 |
