Skin Conditioning

PEG-3 Dioleoylamidoethylmonium Methosulfate

INCI: PEG-3 DIOLEOYLAMIDOETHYLMONIUM METHOSULFATE

Reviewed by Rosie · Last updated 14 Aug 2026

Also known as: Peg-3 Dioleoylamidoethylmonium Methosulfate

A conditioning agent that helps reduce static and improve texture in rinse-off formulations

Best For Skin Types

All

Usage Frequency

Daily

What Is PEG-3 Dioleoylamidoethylmonium Methosulfate?

PEG-3 Dioleoylamidoethylmonium Methosulfate is a synthetic conditioning agent derived from polyethylene glycol (PEG) combined with oleic acid-derived compounds. It belongs to a class of ingredients called quaternary ammonium compounds, which are positively charged molecules designed to bind to hair and skin surfaces.

In skincare products, this ingredient primarily functions as an antistatic agent and conditioning emollient. It works by reducing the electrical charge that builds up on hair and skin surfaces, which can cause frizz, static cling, or a rough texture. Its conditioning properties help improve the overall feel and slip of formulations, particularly in rinse-off products like cleansers and shampoos.

How It Works

This ingredient works through its positively charged molecular structure, which attracts to the negatively charged surface of skin and hair. Once bound to the surface, it reduces the electrical imbalance that causes static behaviour, resulting in a smoother, less frizzy appearance.

The oleic acid components also provide mild emollient properties, helping the product glide across the skin and leaving a softer feel. Because it is a rinse-off ingredient, its benefits are temporary and reset with the next cleanse.

Clinical Evidence & References

PEG-3 Dioleoylamidoethylmonium Methosulfate is widely used in the cosmetics industry and has a long history of safe use in rinse-off formulations. However, dedicated clinical studies specifically investigating this ingredient's skincare efficacy are limited in published literature.

Its antistatic and conditioning properties are well-established in cosmetic science and textile applications, and it is generally recognised as safe by regulatory bodies including the CosIng database. For specific skin concerns, the evidence base relies primarily on ingredient class knowledge and formulators' experience rather than robust clinical trials.

How to Use

This ingredient is typically found in rinse-off products such as cleansers and shampoos, where it is rinsed away after use. Simply use your product as directed and rinse thoroughly with water. No special application technique is needed. Because it is a rinse-off ingredient, it does not require specific timing or frequency considerations beyond your normal cleansing routine.

Safety & Precautions

Generally well-tolerated in rinse-off formulations. As with any ingredient, those with known sensitivity to quaternary ammonium compounds should exercise caution, though reactions are uncommon.

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