PEG-55 Propylene Glycol Oleate

PEG / Ethoxylated

What is PEG-55 Propylene Glycol Oleate?

PEG-55 Propylene Glycol Oleate is a synthetic ingredient formed by ethoxylating propylene glycol oleate, derived from oleic acid—a fatty acid from plant or animal oils—and polyethylene glycol. It belongs to the PEG ester family, commonly used in rinse-off products like shampoos, body washes, and facial cleansers. In formulations, it works by reducing surface tension, which allows oil and water to mix effectively, enabling the creation of stable emulsions and micelles. This action helps dissolve fragrances and oils into watery bases, improves product clarity, and controls thickness for better texture and spreadability. Its high degree of ethoxylation (55 moles of ethylene oxide) makes it water-soluble and mild, supporting gentle cleansing without stripping skin's natural moisture barrier excessively.

Comedogenic Rating 0/5 Low risk of clogging pores

EWG Safety Rating 1-3 View on EWG →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Surfactant

Lowers surface tension to enable cleansing, emulsifying, and foaming; central to shampoos, body washes, and many emulsions and micellar systems.

Cleansing agent

Removes dirt, oil, and impurities by lowering surface tension and forming micelles, enabling soils to be lifted and rinsed away from skin, hair, or teeth.

Solubilizing agent

Helps incorporate oils and fragrance into water-based formulas by forming micro-solutions, enabling clear sprays, toners, and micellar products.

Viscosity controlling agent

Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.

Benefits

Enhances cleansing by forming micelles that lift dirt and oils for easy rinsing.

Solubilizes fragrances and oils, creating clear, stable water-based products.

Controls viscosity to improve product texture and application ease.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit	Who Should Avoid
Users of shampoos and body washes seeking effective yet mild cleansing.	Those with known sensitivity to PEG compounds or ethoxylated ingredients.
Individuals preferring clear toners or sprays with incorporated fragrances.	Individuals preferring completely natural or PEG-free formulations.
People with normal skin types using daily rinse-off products.	Users of leave-on products where potential impurities could accumulate.

Safety Notes

Rated low hazard (1-3) by EWG, indicating general safety in cosmetics.
May contain trace impurities like ethylene oxide; choose products from reputable manufacturers.

Frequently Asked Questions about PEG-55 Propylene Glycol Oleate

What does PEG-55 Propylene Glycol Oleate do in products?

It acts as a surfactant to cleanse, emulsify oils into water, and adjust thickness for better stability.

Is it safe for sensitive skin?

Generally low irritation potential per safety assessments, but patch test if sensitive to PEGs.

Why is it used in shampoos?

It enables foaming, solubilizes scents, and rinses cleanly without residue.