Sodium phosphate is a salt used in skincare primarily as a buffering agent to maintain formula pH and as a sequestrant or emulsifier. It is considered a functional base ingredient rather than a treatment active.
| Reported effect | How often | Notes |
|---|---|---|
Skin irritation | Rare | Occasional mild irritation or stinging, typically at higher concentrations or on compromised skin. |
Allergic contact dermatitis | Very rare | Isolated sensitization reports; uncommon for this ingredient class. |
Transient dryness | Rare | May contribute to dryness in some formulations, often formulation-dependent. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.