Alcohol Denat.

Also known as: Denatured Alcohol, Ethanol, SD Alcohol

Moderate ConcernalcoholEWG: 5-8

Denatured ethanol used as a solvent, preservative, and penetration enhancer — but drying and disruptive to the barrier.

How it works

Alcohol Denat. is ethanol made undrinkable by adding denaturing agents. At high concentrations in cosmetics (>20%), it disrupts the skin barrier by dissolving lipids, increases TEWL, and causes dryness and irritation over time. At low concentrations in a formula or in rinse-off products it has minimal impact. It is particularly problematic in leave-on products marketed as 'oil-free' toners.

Best for

Not recommended as a key ingredient

Avoid if

Dry skinSensitive skinRosaceaCompromised barrier

Commonly found in

TonersSetting spraysAstringentsPerfume

Safety & restrictions

Disrupts skin barrier with regular use. Drying. Can cause or worsen redness and sensitivity. Look for it in the first five ingredients — that indicates a high concentration. Lower on the list (last few ingredients) is less concerning.

Found Alcohol Denat. in a product? Scan the label to get a full safety analysis.

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For informational purposes only. Not medical advice. Consult a dermatologist for personalised guidance.