Snapshot
- Overview
- Washing soda used to boost the cleaning power of a formula.
- Category
- Cleansing
- Type
- pH Adjuster
Sodium Carbonate
Sodium Carbonate is an inorganic alkaline salt commonly known as washing soda. It's used in cosmetics and cleansers to raise pH, improve cleaning action, and act as a buffering agent or builder in detergency-focused formulas.
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Our take
Is Sodium Carbonate a Good Ingredient?
It rates Fair: it's effective as a high-alkaline pH adjuster and cleanser booster, but its elevated pH can disrupt the skin barrier and increase irritation risk, so it's best reserved for dilute, rinse-off formulas rather than daily leave-on use.
What it does
Skin Benefits
It boosts cleansing strength to tackle heavy soil, oils, and product buildup, and is best suited for rinse-off use; those with sensitive skin may prefer lower concentrations given its alkalinity.
Where you'll find it
Uses in Skincare & Cosmetics
It's found in deep-cleaning face or body washes, clarifying shampoos, and bath soaks where a stronger degreasing effect is needed.
Before you use it
Safety
It carries irritation potential, especially for sensitive or damaged skin, and can sting eyes and mucous membranes. Use it at low concentrations and rinse thoroughly; no specific cosmetic-use restrictions are commonly cited.
Products with Sodium Carbonate
