Ingredient review
PEG-60 Castor Oil Isostearate
INCI: PEG-60 Castor Oil Isostearate
A gentle emulsifier that helps mix oil and water, but may not suit those avoiding PEG compounds.
In plain English
PEG-60 Castor Oil Isostearate is a helper ingredient that allows oil and water to blend together smoothly in products like cleansers and lotions. It is made by attaching polyethylene glycol (PEG) chains to castor oil and then adding isostearic acid. This process creates a mild surfactant that can also help dissolve makeup and excess oil without stripping the skin.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- semi synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
PEG-60 Castor Oil Isostearate is generally a lower-concern ingredient when the full formula suits your skin.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging PEG-60 Castor Oil Isostearate.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
A semi-synthetic compound created by reacting castor oil with ethylene oxide (forming PEG-60 castor oil) and then esterifying it with isostearic acid. It functions as a non-ionic emulsifier and surfactant.
How it works
It reduces the surface tension between oil and water, allowing them to form a stable mixture. In cleansers, it helps lift and rinse away oils and makeup. In creams, it keeps the formula from separating.
Pros
Gentle emulsifier
It blends oil and water without harsh detergents, making it suitable for daily cleansing and moisturizing products.
Improves product texture
Formulas feel smoother and more luxurious, which can enhance your application experience.
Cons and cautions
PEG-related concerns
The manufacturing process may introduce trace impurities like 1,4-dioxane, though reputable brands keep levels within safe limits.
Not natural
If you prefer plant-only ingredients, this semi-synthetic compound may not align with your preferences.
Best for
- People with normal to combination skin looking for a gentle cleanser
- Anyone using oil-based makeup removers or cleansing balms
Use caution if
- Those who strictly avoid PEG compounds or prefer 100% natural skincare
Usage tips
Safety summary
PEG-60 Castor Oil Isostearate is generally recognized as safe in cosmetics when formulated properly. The main concern is potential trace contamination from the manufacturing process, which is regulated. It has low irritation and comedogenic potential.
Research notes
The Cosmetic Ingredient Review (CIR) panel has evaluated PEG derivatives and found them safe for use in cosmetics at typical concentrations. No significant human or animal studies specifically on this ingredient are available, but its safety profile is inferred from related PEG compounds.
Common label clues
- Typical concentration
- 1% to 5%
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions, with concentration limits for impurities like 1,4-dioxane.
- Common uses
- Cleansers, Makeup removers, Lotions, Creams
- Environmental note
- As a semi-synthetic compound, it is not biodegradable as quickly as some natural alternatives, but it is not considered a major environmental concern at typical usage levels.
Good to know
- PEG-60 Castor Oil Isostearate is considered safe by the Cosmetic Ingredient Review (CIR) panel at typical use levels.
- It is often used in micellar waters and cleansing oils for its gentle yet effective cleansing power.
Common questions
What is PEG-60 Castor Oil Isostearate in beauty products?
PEG-60 Castor Oil Isostearate is a helper ingredient that allows oil and water to blend together smoothly in products like cleansers and lotions. It is made by attaching polyethylene glycol (PEG) chains to castor oil and then adding isostearic acid. This process creates a mild surfactant that can also help dissolve makeup and excess oil without stripping the skin.
What does PEG-60 Castor Oil Isostearate do in a beauty product?
It reduces the surface tension between oil and water, allowing them to form a stable mixture. In cleansers, it helps lift and rinse away oils and makeup. In creams, it keeps the formula from separating.
Is PEG-60 Castor Oil Isostearate safe for most people?
PEG-60 Castor Oil Isostearate is generally recognized as safe in cosmetics when formulated properly. The main concern is potential trace contamination from the manufacturing process, which is regulated. It has low irritation and comedogenic potential.
Who should be careful with PEG-60 Castor Oil Isostearate?
Those who strictly avoid PEG compounds or prefer 100% natural skincare
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.