What Is Bis-(Methoxy Peg-11 Epoxidized Soyate) Peg-13?
Bis-(Methoxy PEG-11 Epoxidized Soyate) PEG-13 is a plant-based helper made from soybean oil. Chemists first turn soy fatty acids into a more stable “epoxidized” form, then attach short chains of polyethylene glycol called Methoxy PEG-11. A second round of bonding with PEG-13 follows, giving the ingredient a water-loving end and an oil-loving end. This split personality lets it mix oil and water, which is why it shows up in modern skincare.
The move toward greener beauty in the late 1990s pushed labs to look at food oils for gentle yet effective surfactants. Soybean oil was plentiful, affordable and already used in soaps, so it became a natural starting point. After safety testing and tweaks to reduce irritation the current form was adopted by formulators.
You can find Bis-(Methoxy PEG-11 Epoxidized Soyate) PEG-13 in face cleansers, micellar waters, creamy body washes, lightweight lotions, sheet masks, hair shampoos and self-foaming makeup removers. Anywhere a silky, stable foam or an even blend of oil and water is needed, this soy-derived ingredient may be on the label.
Bis-(Methoxy Peg-11 Epoxidized Soyate) Peg-13’s Cosmetic Benefits/Uses
Here is what this multifunctional ingredient brings to a formula:
- Cleansing: Lifts dirt, sweat and makeup from skin and hair so they can be rinsed away without stripping natural moisture
- Dispersing: Keeps pigments, clays and exfoliating beads spread out evenly which stops clumping and ensures smooth application
- Emulsifying: Binds oil and water phases to create stable lotions and creams that do not separate on the shelf
- Foam Boosting: Enhances lather volume and density giving washes and shampoos a rich cushiony feel
- Solubilizing: Helps dissolve small amounts of oils or fragrances into clear water-based formulas like toners and micellar waters
Who Can Use Bis-(Methoxy Peg-11 Epoxidized Soyate) Peg-13
This soy derived surfactant is generally well tolerated by most skin types including oily, combination and sensitive skin because it is mild and helps keep the skin’s natural oils intact. Very dry or eczema-prone skin may still need richer moisturizers afterward since any cleanser can leave them feeling tight if overused.
Because its raw materials are plant based and the production process does not rely on animal by-products it is considered suitable for vegans and vegetarians.
No data suggests that the ingredient poses special risks to women who are pregnant or breastfeeding when used in rinse-off or leave-on cosmetics at typical levels. Still, this is not medical advice and anyone expecting or nursing should review all skincare products with a qualified health professional to be safe.
Bis-(Methoxy PEG-11 Epoxidized Soyate) PEG-13 does not increase photosensitivity so it will not make skin more prone to sunburn. It is also fragrance free and nonionic which lowers the chance of cross-reactions with other actives in a routine.
Potential Side Effects/Adverse Reactions
Responses to topical Bis-(Methoxy PEG-11 Epoxidized Soyate) PEG-13 vary from person to person. The points below list potential side effects yet these outcomes are uncommon when the ingredient is used correctly in a finished cosmetic.
- Mild transient stinging if applied to freshly shaved or broken skin
- Temporary eye irritation if the product accidentally gets into the eyes
- Localized redness or itching in individuals with a known polyethylene glycol sensitivity
- Very rare allergic contact dermatitis marked by persistent rash and swelling
If any of these reactions occur discontinue use and seek advice from a healthcare professional.
Comedogenic Rating
Rating: 1/5 – Bis-(Methoxy PEG-11 Epoxidized Soyate) PEG-13 is highly water soluble and formulated to rinse away cleanly, so it seldom lingers inside pores. Its large, amphiphilic structure makes it far less likely to create the kind of solid plug that sparks whiteheads or blackheads.
With this low score it is generally suitable for acne-prone skin.
The overall pore-clogging potential of a finished product still depends on the other ingredients and how often it is used.
Summary
Bis-(Methoxy PEG-11 Epoxidized Soyate) PEG-13 is a soy based workhorse that cleanses, disperses, emulsifies, boosts foam and solubilizes by bridging oil and water. Its epoxidized soy tail grabs oily grime while the PEG ends bond with water, letting the whole complex whisk debris away and keep formulas smooth and stable.
Although not a celebrity ingredient it is popping up more often in eco-minded cleansers, micellar waters and light lotions thanks to its plant origin and multitasking nature.
Safety studies show a low irritation profile for most skin types, making it a reliable addition to both rinse off and leave on products. Even so, trying a small patch first is always a smart move when testing any new formula.