What it is
This ingredient is a phosphonate-based molecule that functions as a chelating agent, binding trace metal ions present in a formulation. By sequestering metals such as iron and copper it helps maintain product stability and protects sensitive ingredients from metal-catalyzed degradation. It is typically used at low levels.
Safety & warnings
Used at low levels as a chelating agent and not associated with notable irritation or sensitization concerns at typical use.
Origin & sourcing
Synthetic; produced through chemical synthesis.
Questions everyone asks
What does this phosphonate do in a sunscreen?
It works as a chelating agent, binding trace metal ions to help keep the formula stable and protect other ingredients from metal-catalyzed breakdown.
Is it used in large amounts?
No. Chelating agents like this are typically present at very low concentrations.