172.5 g/kg = 173.345 PSU
| g/kg | PSU |
|---|---|
| 157.5 g/kg | 158.272 |
| 162.5 g/kg | 163.296 |
| 167.5 g/kg | 168.321 |
| 172.5 | 173.345 |
| 177.5 g/kg | 178.37 |
| 182.5 g/kg | 183.394 |
| 187.5 g/kg | 188.419 |
172.5 g/kg = 173.345 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)