PEG-200
PEG-200 is a polyethylene glycol, a family of polymers made by reacting ethylene oxide with water. In the hyphenated name, 200 refers to the average number of ethylene oxide units in the chain. It is therefore neither a botanical extract nor an oil.
PEG-200: what it is
PEG-200 is a polyethylene glycol, a family of polymers made by reacting ethylene oxide with water. In the hyphenated name, 200 refers to the average number of ethylene oxide units in the chain. It is therefore neither a botanical extract nor an oil.
The punctuation matters. PEG-200, with a hyphen, identifies the average chain size; PEG 200, without one, can use a convention linked to average mass. The distinction prevents confusion between materials in the same family that have different chain sizes and physical characteristics.
PEG-200: what it does in cosmetics
In cosmetics, PEG-200 can work as a solvent and humectant. As a solvent, it helps compatible ingredients distribute through a base; as a humectant, it helps keep water associated with the preparation. This can support a more even texture and the way a product spreads during application.
These roles concern how a formula behaves, rather than treating the skin. PEG-200 on its own is not an active treatment for acne, dark spots, or wrinkles; its value lies in helping build a preparation with the intended consistency and distribution.
Products containing this ingredient
See which products include it and the name used in each composition.
