Ingredient review
PEG-6 Hydrogenated Castor Oil
INCI: PEG-6 Hydrogenated Castor Oil
A gentle emulsifier that helps oils and water mix, making cleansers and toners feel smooth without heavy residue.
In plain English
PEG-6 Hydrogenated Castor Oil is a semi-synthetic ingredient made from castor oil. It helps water and oil blend together in products like cleansers and toners, so they feel light and rinse off easily. It is considered very gentle and unlikely to clog pores or irritate 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-6 Hydrogenated Castor Oil 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-6 Hydrogenated Castor Oil.
- 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 polyethylene glycol (PEG) derivative of hydrogenated castor oil, used as a non-ionic emulsifier and solubilizer in cosmetics.
How it works
It reduces the surface tension between oil and water, allowing them to mix into a stable, clear or milky product. This helps dissolve oils and fragrances into water-based formulas and improves rinse-off performance.
Pros
Lightweight feel
Creates thin, non-greasy emulsions that rinse off cleanly, ideal for oily or combination skin.
Low irritation potential
Rated as very low irritant and non-comedogenic, making it safe for most skin types including sensitive skin.
Cons and cautions
Not for anhydrous formulas
Requires water to function as an emulsifier, so it won't work in oil-only or balm products.
Purity concerns
As a PEG derivative, manufacturing impurities like ethylene oxide or 1,4-dioxane are possible, though reputable brands ensure purification.
Best for
- People with normal to oily skin who prefer lightweight cleansers
- Anyone using micellar waters or gel-based makeup removers
Use caution if
- Those with known sensitivity to PEG compounds (rare)
Usage tips
Safety summary
PEG-6 Hydrogenated Castor Oil is considered safe for cosmetic use at typical concentrations. It has low irritation and comedogenic potential. As with all PEGs, quality depends on manufacturing purity; choose products from reputable brands.
Research notes
The Cosmetic Ingredient Review (CIR) panel has reviewed PEG derivatives and found them safe for use in cosmetics when formulated to minimize impurities. No specific studies on PEG-6 Hydrogenated Castor Oil alone were found, but it is grouped with similar PEGs in safety assessments.
Common label clues
- Typical concentration
- 0.5% to 5% of the formula
- Regulatory status
- Approved for use in cosmetics by the FDA (as part of generally recognized ingredients) and by the EU CosIng database. The Cosmetic Ingredient Review (CIR) panel has deemed PEG derivatives safe when properly purified.
- Common uses
- Cleansers, Toners, Serums, Makeup removers
- Environmental note
- PEG compounds are generally biodegradable, but their production relies on petrochemical processing. Plant-derived castor oil base reduces some environmental impact.
Good to know
- PEG-6 Hydrogenated Castor Oil is often used to solubilize essential oils and fragrances into water-based toners.
- It is considered safe by major regulatory bodies when used at typical cosmetic levels.
Common questions
What is PEG-6 Hydrogenated Castor Oil in beauty products?
PEG-6 Hydrogenated Castor Oil is a semi-synthetic ingredient made from castor oil. It helps water and oil blend together in products like cleansers and toners, so they feel light and rinse off easily. It is considered very gentle and unlikely to clog pores or irritate skin.
What does PEG-6 Hydrogenated Castor Oil do in a beauty product?
It reduces the surface tension between oil and water, allowing them to mix into a stable, clear or milky product. This helps dissolve oils and fragrances into water-based formulas and improves rinse-off performance.
Is PEG-6 Hydrogenated Castor Oil safe for most people?
PEG-6 Hydrogenated Castor Oil is considered safe for cosmetic use at typical concentrations. It has low irritation and comedogenic potential. As with all PEGs, quality depends on manufacturing purity; choose products from reputable brands.
Who should be careful with PEG-6 Hydrogenated Castor Oil?
Those with known sensitivity to PEG compounds (rare)
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.