672.5 PSU to ppm

672.5 PSU = 669,220.8 ppm

PSUppm
657.5 PSU654,294
662.5 PSU659,269.6
667.5 PSU664,245.2
672.5669,220.8
677.5 PSU674,196.4
682.5 PSU679,172.1
687.5 PSU684,147.7

672.5 PSU = 669,220.8 ppm

Formula

1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)