What concentration of Sodium Phosphate is effective?

Typical effective concentrations of Sodium Phosphate are Typically <1% in cosmetic formulations as a pH buffer.

What skin types is Sodium Phosphate suitable for?

Sodium Phosphate is suitable for all skin types.

The Skin Formulary

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Researched by Helena DeMaria-Williams

Formula IngredientBuffering Agent

Sodium Phosphate

Q: What is Sodium Phosphate and what does it do in skincare?

Sodium Phosphate (sodium dihydrogen orthophosphate) is an inorganic salt used in cosmetics primarily as a pH buffering agent. It helps maintain a stable pH in formulations, ensuring that active ingredients remain effective and that the product stays within a safe pH range for skin contact. It is a technical ingredient that does not provide direct skin benefits.

Q: Can Sodium Phosphate cause skin irritation?

Sodium Phosphate has a low irritation risk. Sodium phosphate is well tolerated at cosmetic buffering concentrations (typically very low). No EU CosIng Annex II or III restrictions apply.

Q: Is Sodium Phosphate safe to use during pregnancy?

Sodium Phosphate is rated "safe" for pregnancy use. An inorganic buffering salt with no known reproductive or developmental toxicity at cosmetic concentrations. Considered safe during pregnancy.

Q: Does Sodium Phosphate increase sun sensitivity?

Sodium Phosphate has a no sun sensitivity risk. Sodium phosphate does not increase photosensitivity. No sun protection precautions are required.

Q: What are the benefits of Sodium Phosphate for skin?

pH buffering, formulation stability, pH control

Q: What skin types is Sodium Phosphate suitable for?

Sodium Phosphate is suitable for all skin types.

INCI: Sodium Phosphate

Sodium Phosphate (sodium dihydrogen orthophosphate) is an inorganic salt used in cosmetics primarily as a pH buffering agent. It helps maintain a stable pH in formulations, ensuring that active ingredients remain effective and that the product stays within a safe pH range for skin contact. It is a technical ingredient that does not provide direct skin benefits.