Ingredient review
PEG-54 Hydrogenated Castor Oil
INCI: PEG-54 Hydrogenated Castor Oil
A gentle emulsifier that helps blend oil and water in cleansers and makeup removers, with a low risk of irritation.
In plain English
PEG-54 Hydrogenated Castor Oil is a semi-synthetic ingredient made by adding polyethylene glycol (PEG) to hydrogenated castor oil. It acts as a bridge between oil and water, allowing them to mix smoothly. This makes it useful in cleansers and makeup removers where it helps dissolve makeup and dirt without leaving a greasy residue. It is also used to dissolve fragrances and essential oils into water-based products. Because it is derived from castor oil, it is generally considered gentle on 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-54 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-54 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 semi-synthetic compound created by reacting hydrogenated castor oil with ethylene oxide (PEG). The result is a water-soluble emulsifier that can stabilize oil-in-water mixtures.
How it works
The PEG chains make the molecule water-loving, while the castor oil portion is oil-loving. This dual nature allows it to surround oil droplets and suspend them in water, creating a stable emulsion. In cleansers, it helps lift and rinse away oil-based impurities.
Pros
Gentle cleansing
Effectively removes makeup and sunscreen without harsh surfactants, making it suitable for daily use.
Versatile emulsifier
Works well in both rinse-off and leave-on products to blend oils and water, improving product feel.
Cons and cautions
Potential trace impurity
Manufacturing can produce trace amounts of 1,4-dioxane, a possible carcinogen, though levels are tightly regulated and generally safe.
Not for water-free formulas
Requires water to function as an emulsifier, so it is not used in pure oil or balm products.
Best for
- People who wear heavy or waterproof makeup and need a gentle oil-based cleanser
- Those with normal to combination skin looking for a non-stripping cleanser
Use caution if
- Individuals with a known sensitivity to PEG compounds or castor oil derivatives
Usage tips
Safety summary
PEG-54 Hydrogenated Castor Oil is considered safe for use in cosmetics at typical concentrations. The main safety concern is the potential for trace 1,4-dioxane contamination, but reputable manufacturers follow purification processes to keep levels well below safety limits. It has a low irritation and comedogenic risk.
Research notes
Studies and safety reviews by the Cosmetic Ingredient Review (CIR) panel have concluded that PEG derivatives of hydrogenated castor oil are safe when formulated to minimize impurities. Research supports their use as effective emulsifiers with low skin irritation potential.
Common label clues
- Typical concentration
- 0.5% to 5% in rinse-off products; lower in leave-on products
- Regulatory status
- Approved for use in cosmetics by the FDA and the European Commission, with concentration limits for leave-on products to minimize potential irritation.
- Common uses
- Cleansers, Makeup removers, Fragrance solubilization, Hair conditioners
- Environmental note
- Derived from castor oil, a renewable plant source, but the PEG processing involves petrochemicals. Biodegradability is moderate.
Good to know
- PEG-54 Hydrogenated Castor Oil is often listed in ingredient labels as part of a blend; look for it in cleansers and makeup removers.
- The number '54' refers to the average number of ethylene oxide units, which affects its water solubility.
Common questions
What is PEG-54 Hydrogenated Castor Oil in beauty products?
PEG-54 Hydrogenated Castor Oil is a semi-synthetic ingredient made by adding polyethylene glycol (PEG) to hydrogenated castor oil. It acts as a bridge between oil and water, allowing them to mix smoothly. This makes it useful in cleansers and makeup removers where it helps dissolve makeup and dirt without leaving a greasy residue. It is also used to dissolve fragrances and essential oils into water-based products. Because it is derived from castor oil, it is generally considered gentle on the skin.
What does PEG-54 Hydrogenated Castor Oil do in a beauty product?
The PEG chains make the molecule water-loving, while the castor oil portion is oil-loving. This dual nature allows it to surround oil droplets and suspend them in water, creating a stable emulsion. In cleansers, it helps lift and rinse away oil-based impurities.
Is PEG-54 Hydrogenated Castor Oil safe for most people?
PEG-54 Hydrogenated Castor Oil is considered safe for use in cosmetics at typical concentrations. The main safety concern is the potential for trace 1,4-dioxane contamination, but reputable manufacturers follow purification processes to keep levels well below safety limits. It has a low irritation and comedogenic risk.
Who should be careful with PEG-54 Hydrogenated Castor Oil?
Individuals with a known sensitivity to PEG compounds or castor oil derivatives
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.