Ingredient review
PEG-40 Hydrogenated Castor Oil Laurate
INCI: PEG-40 HYDROGENATED CASTOR OIL LAURATE
A gentle emulsifier that helps mix oils and water, but may not suit those avoiding ethoxylated ingredients.
In plain English
PEG-40 Hydrogenated Castor Oil Laurate is a semi-synthetic ingredient made by adding ethylene oxide to hydrogenated castor oil and lauric acid. It acts as an emulsifier, meaning it helps oil and water blend together in products like cleansers and creams. This creates a smooth, stable texture and can also help remove makeup and sunscreen. It is generally considered gentle and low risk for irritation or clogging pores, but because it is processed with ethylene oxide (a potential contaminant), some people prefer to avoid PEG compounds for personal or environmental reasons.
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-40 Hydrogenated Castor Oil Laurate 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-40 Hydrogenated Castor Oil Laurate.
- 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 emulsifier created by reacting hydrogenated castor oil with lauric acid and ethylene oxide. It belongs to the PEG (polyethylene glycol) family and is used to stabilize oil-in-water emulsions.
How it works
Its PEG chain makes it water-soluble while the fatty acid portion is oil-soluble, allowing it to reduce surface tension between oil and water. This creates a stable, uniform mixture that improves product texture and helps rinse away oils and dirt.
Pros
Gentle emulsifier
Helps mix oils and water without causing irritation, making it suitable for sensitive skin in rinse-off products.
Effective cleanser
Works well in makeup removers and cleansers to dissolve stubborn sunscreen and cosmetics without excessive rubbing.
Cons and cautions
Ethoxylation concerns
The manufacturing process can produce trace amounts of 1,4-dioxane, a potential carcinogen, though levels are typically low in finished products.
Environmental persistence
PEG compounds are not readily biodegradable and can contribute to aquatic pollution, which may be a concern for eco-conscious users.
Best for
- People with normal to dry skin who use creamy cleansers or lotions
- Anyone looking for a gentle makeup remover that doesn't strip the skin
Use caution if
- Those who specifically avoid ethoxylated ingredients or PEG compounds
Usage tips
Safety summary
Considered safe for use in cosmetics at typical concentrations. The main concern is potential contamination with 1,4-dioxane during manufacturing, but reputable suppliers keep levels well below safety limits. Low irritation and comedogenic risk.
Research notes
The Cosmetic Ingredient Review (CIR) panel has evaluated PEG compounds and found them safe as used in cosmetics. Studies show low skin irritation and sensitization potential. Environmental studies note limited biodegradability.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics by the FDA and EU CosIng database, with no concentration restrictions. Manufacturers are encouraged to purify to minimize 1,4-dioxane.
- Common uses
- Cleansers, Makeup removers, Lotions, Creams
- Environmental note
- PEG compounds are generally not biodegradable and may persist in water systems. Some brands are moving toward biodegradable alternatives.
Good to know
- PEG-40 Hydrogenated Castor Oil Laurate is often used in micellar waters and oil cleansers
- The '40' refers to the average number of ethylene oxide units, which affects its water solubility
Common questions
What is PEG-40 Hydrogenated Castor Oil Laurate in beauty products?
PEG-40 Hydrogenated Castor Oil Laurate is a semi-synthetic ingredient made by adding ethylene oxide to hydrogenated castor oil and lauric acid. It acts as an emulsifier, meaning it helps oil and water blend together in products like cleansers and creams. This creates a smooth, stable texture and can also help remove makeup and sunscreen. It is generally considered gentle and low risk for irritation or clogging pores, but because it is processed with ethylene oxide (a potential contaminant), some people prefer to avoid PEG compounds for personal or environmental reasons.
What does PEG-40 Hydrogenated Castor Oil Laurate do in a beauty product?
Its PEG chain makes it water-soluble while the fatty acid portion is oil-soluble, allowing it to reduce surface tension between oil and water. This creates a stable, uniform mixture that improves product texture and helps rinse away oils and dirt.
Is PEG-40 Hydrogenated Castor Oil Laurate safe for most people?
Considered safe for use in cosmetics at typical concentrations. The main concern is potential contamination with 1,4-dioxane during manufacturing, but reputable suppliers keep levels well below safety limits. Low irritation and comedogenic risk.
Who should be careful with PEG-40 Hydrogenated Castor Oil Laurate?
Those who specifically avoid ethoxylated ingredients or PEG compounds
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.