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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Ingredient Snapshot

Overview
Washing soda used to boost the cleaning power of a formula.
Category
Cleansing
Type
pH Adjuster

Ingredient Ratings

Overall Rating

Fair

Comedogenic Risk

None

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.

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.

Comedogenic Rating

This ingredient is not typically evaluated for comedogenicity, and no standardized rating is available.

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.

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.

Products with Sodium Carbonate

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