Polyphosphate Salt

Mass concentration (mg/l)

High (+1)

Low (−1)

Na₅P₃O₁₀ Tripoly-P

0.996

0.460

K₄P₂O₇ Pyro-P

1.300

0.600

(NaPO₃)₆ Hexameta-P

1.010

0.468