The Skin Formulary
IngredientsBrandsJournalShop
Browse Products

Researched by Helena DeMaria-Williams

Formula IngredientBuffering Agent

Sodium Citrate

INCI: Trisodium Citrate

Sodium citrate (trisodium citrate) is a salt of citric acid used primarily as a pH buffering agent and chelating agent in cosmetic formulations. It adjusts and stabilises the pH of products while also neutralising metal ions that can destabilise formulas. It is a widely used helper ingredient across skincare, haircare, and cleansing products.

Category

Buffering Agent

Irritation Risk

Low

Skin Types

all skin types

What does this do in a formula?

pH buffering, chelating, formula stabilisation, metal ion neutralisation

Is Sodium Citrate safe? Key considerations

Can Sodium Citrate cause irritation?

Low Risk

Sodium citrate is well tolerated at typical cosmetic concentrations and is considered non-irritating. It is also widely used in food and pharmaceuticals. No EU CosIng Annex II or III restrictions apply.

Does Sodium Citrate increase sun sensitivity?

No Risk

Sodium citrate does not increase photosensitivity. No sun protection precautions are required.

Is Sodium Citrate safe during pregnancy?

Safe

Sodium citrate is a food-grade salt of citric acid with a long history of safe use in food, pharmaceuticals, and cosmetics. No reproductive or developmental concerns are noted.

How does Sodium Citrate work?

Sodium citrate (trisodium citrate) is a salt of citric acid used primarily as a pH buffering agent and chelating agent in cosmetic formulations. It adjusts and stabilises the pH of products while also neutralising metal ions that can destabilise formulas. It is a widely used helper ingredient across skincare, haircare, and cleansing products.

Which products contain Sodium Citrate?

Shop products that contain Sodium Citrate