Ingredient dictionary

Butylene Glycol

Also listed as: 1,3-Butylene Glycol, 1,3-Butanediol

Butylene Glycol is a clear, odorless liquid that attracts and holds water. It is a humectant and solvent used to help formulas feel smooth and stay hydrated. It is on the label of 258 products in our library. Checked against our library November 6, 2026.

The catch: none for most people; check the full product list if your skin reacts easily.

What Butylene Glycol does

Pulls water into the skin and formula
Dissolves other ingredients evenly
Gives a light, smooth feel

Butylene glycol can be made in more than one way, including chemical synthesis and the fermentation of plant sugars. Both routes give the same molecule, so the ingredient is the same on the label.

Formulators like it because it attracts water without leaving a heavy film. It also helps dissolve other ingredients, such as some fragrance oils and certain active ingredients, so the formula stays clear and uniform. On the skin, it feels light and smooth, and it is less sticky than glycerin.

Good for

Suits most skin types, including dry skin, and fits lightweight moisturizers, cleansers, sunscreens, and makeup.

Be careful if

Nothing in particular for most skin types.

Frequently asked questions

Is Butylene Glycol safe for skin?

Butylene glycol is widely used in skincare and makeup and is generally well tolerated. Like any ingredient, a small number of people may react to it, so patch testing a new product is a sensible habit. Check with a dermatologist if you have a known reaction.

Does Butylene Glycol make skin oily?

No, it is not an oil, so it does not add grease. It is a water-loving liquid that helps skin hold moisture. Formulas with it often feel light. How oily a product feels depends mostly on its other ingredients.