PEG-9

Functions
Humectant
Solvent
Penetration enhancer
CAS Number(s)
25322-68-3
FDA UNII
5IRA46LB71

PEG-9 is a polyethylene glycol (with nine ethylene glycol units) that is a clear, colorless liquid that is almost tasteless and odorless. It has good solvent power for numerous substances sparingly soluble in water and is mainly used as a solvent to produce liquid preparations.

PEG-9 can form complexes with active ingredients and act as a powerful solubilizer. In some cases, this ability can inactivate active substances and limit their bioavailability. So, the impact on the efficiency and the absorbability of the active substances used should be tested individually.

Likewise, to medium-length liquid polyethylene glycols, PEG-9 can also be used as a carrier for active substances, solubilizers, and absorption improvers for actives that are insoluble or sparingly soluble in water, e.g., steroids and fat-soluble vitamins. It exhibits very little acute toxicity and good compatibility with the skin.

PEG-9 imparts consistency and solubility, carriers, lubricants, heat stabilizers, and fixatives, and it is used in the manufacture of toothpaste, lipsticks, shaving creams, nail care products, and decorative cosmetics. Its use in soap manufacture should be highlighted, and it is particularly estimated to be a milling agent, fixative, and for the prevention of cracks.
See also
Synonyms
Polyethylene Glycol 450
Lutrol® E 400

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