Butylene Glycol

Butylene Glycol is a small organic alcohol used in cosmetics as a solvent, humectant, and penetration enhancer. It helps dissolve other ingredients, attracts water to the skin to improve hydration, and can help active ingredients penetrate the skin more effectively. It also contributes to the texture and spreadability of formulations.

BenefitModerate 1.5 / 4

Hydration i1.5 / 4

Whether the ingredient helps increase the skin’s water content — humectants that attract water, ingredients that reduce water loss, or ones that make skin feel less dry.

RiskLow 0.5 / 4

Irritation i0.5 / 4

Risk of short-term irritation — stinging, burning, dryness, redness, or discomfort. Common for strong actives, acids, retinoids, fragrances, and harsh surfactants.

Eye irritation i0.1 / 4

Whether it may sting or irritate around the eyes. Relevant for sunscreens, fragrances, acids, surfactants, and volatile ingredients.

Sensitization i0.1 / 4

Risk of allergic contact dermatitis or immune-based reactions. Fragrance allergens, preservatives, botanicals, and some dyes may score here.

Rated by SpottyLabs' ingredient methodology, independent of brands.

What it helps with

• improves hydration
• enhances ingredient penetration
• improves product texture

Things to watch

• potential for mild irritation in very sensitive individuals

Products with Butylene Glycol

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Frequently asked questions

What is the primary role of Butylene Glycol in skincare products?

Butylene Glycol serves multiple roles, primarily acting as a humectant to draw moisture into the skin, a solvent to dissolve other ingredients, and a penetration enhancer to help active compounds work more effectively.

Is Butylene Glycol safe for sensitive skin?

While generally considered safe, some individuals with very sensitive skin might experience mild irritation. It is less irritating than some other glycols, but patch testing is always recommended if you have known sensitivities.