Ingredient review
PEG-54 Castor Oil
INCI: PEG-54 Castor Oil
A gentle emulsifier that helps mix oil and water in cleansers and lotions, but may not suit those avoiding ethoxylated ingredients.
In plain English
PEG-54 Castor Oil is a modified version of castor oil that has been treated with ethylene oxide to make it water-friendly. In skincare, it acts like a bridge between oil and water, allowing them to blend into a smooth, stable product. You'll find it in cleansers, shampoos, and makeup removers where it helps lift dirt and oil while rinsing cleanly. It's generally considered gentle and low-risk for irritation or clogging pores.
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 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 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 ingredient made by reacting castor oil with ethylene oxide, creating a water-soluble emulsifier that helps oil and water mix.
How it works
It reduces the surface tension between oil and water, allowing them to form a stable emulsion. In cleansers, it also helps break down sebum and makeup so they can be rinsed away.
Pros
Gentle emulsifier
Helps blend oil and water into stable, creamy formulas that rinse cleanly without leaving a greasy residue.
Low irritation risk
Generally well-tolerated even on sensitive skin, with low potential for clogging pores or causing breakouts.
Cons and cautions
Ethoxylation concerns
The manufacturing process can produce trace impurities like 1,4-dioxane, though reputable brands purify their ingredients to safe levels.
Not natural
Despite being derived from castor oil, it undergoes chemical modification, so it won't appeal to those seeking all-natural or PEG-free products.
Best for
- People with normal to oily skin looking for gentle cleansers
- Those who prefer creamy, non-stripping formulas
Use caution if
- Individuals with known sensitivity to PEG compounds
- Those seeking completely natural or PEG-free formulations
Usage tips
Safety summary
PEG-54 Castor Oil is considered safe for cosmetic use at typical concentrations. The main concern is potential trace contamination from the ethoxylation process, but reputable suppliers purify the ingredient to meet safety standards. It has low irritation and comedogenic potential.
Research notes
Safety assessments by the Cosmetic Ingredient Review (CIR) panel have found PEG compounds safe for use in cosmetics when properly formulated. Studies indicate low acute toxicity and minimal skin irritation.
Common label clues
- Typical concentration
- 1% to 10%
- Regulatory status
- Approved for use in cosmetics globally, with concentration limits varying by region. The EU and FDA consider it safe when used as directed.
- Common uses
- Cleansers, Shampoos, Body washes, Makeup removers, Lotions
- Environmental note
- PEG compounds can be slow to biodegrade, but they are not known to bioaccumulate. Some manufacturers are moving toward greener alternatives.
Good to know
- PEG-54 Castor Oil is often used alongside other emulsifiers to fine-tune texture and stability.
- The number '54' refers to the average number of ethylene oxide units, which determines its water solubility.
Common questions
What is PEG-54 Castor Oil in beauty products?
PEG-54 Castor Oil is a modified version of castor oil that has been treated with ethylene oxide to make it water-friendly. In skincare, it acts like a bridge between oil and water, allowing them to blend into a smooth, stable product. You'll find it in cleansers, shampoos, and makeup removers where it helps lift dirt and oil while rinsing cleanly. It's generally considered gentle and low-risk for irritation or clogging pores.
What does PEG-54 Castor Oil do in a beauty product?
It reduces the surface tension between oil and water, allowing them to form a stable emulsion. In cleansers, it also helps break down sebum and makeup so they can be rinsed away.
Is PEG-54 Castor Oil safe for most people?
PEG-54 Castor Oil is considered safe for cosmetic use at typical concentrations. The main concern is potential trace contamination from the ethoxylation process, but reputable suppliers purify the ingredient to meet safety standards. It has low irritation and comedogenic potential.
Who should be careful with PEG-54 Castor Oil?
Individuals with known sensitivity to PEG compounds Those seeking completely natural or PEG-free formulations
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.