Ingredient dictionary

Dipropylene Glycol

Dipropylene glycol is a clear liquid that works as a solvent and a humectant, meaning it draws in water. Its main job is helping ingredients blend. It is on the label of 57 products in our library. Checked against our library November 6, 2026.

What Dipropylene Glycol does

Dissolves and blends other ingredients
Attracts and holds water
Helps formulas feel smooth

Dipropylene glycol is a synthetic ingredient made from propylene glycol, a simple building block that comes from petroleum-based raw materials. It belongs to the glycol family, a group of small alcohols that mix readily with water.

Formulators use it because it dissolves many ingredients, including some that do not blend well with water alone. It also attracts and holds water, so it helps keep skin and hair feeling soft. The texture is light and slightly slippery, and it spreads easily, so it fits well in rinse-off products and leave-on products alike.

Good for

Suits everyday products like body wash, conditioner, and styling products, where smooth blending and some moisture matter.

Frequently asked questions

Is dipropylene glycol safe?

It is widely used in cosmetics and is generally well tolerated. Like any ingredient, it can bother very sensitive skin in some people, so testing a new product on a small patch first is a sensible habit.

Is dipropylene glycol the same as propylene glycol?

They are related but not the same. Dipropylene glycol is made of two propylene glycol units joined together, so it is a larger molecule. Both work as solvents and moisture-holding agents in cosmetics.