Ingredient review
Stearyl Erucate
INCI: Stearyl Erucate
A gentle, non-greasy emollient that helps soften and smooth skin with a low risk of irritation or clogged pores.
In plain English
Stearyl Erucate is a synthetic ingredient made from stearyl alcohol and erucic acid (a fatty acid found in rapeseed oil). In skincare, it acts as an emollient, meaning it helps soften and smooth the skin by forming a light, breathable film that reduces water loss. It feels silky and non-greasy, making it popular in moisturizers, lip balms, and hair products. It is considered very safe and unlikely to cause irritation or breakouts.
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
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Stearyl Erucate 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 Stearyl Erucate.
- 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
Stearyl Erucate is an ester created by combining stearyl alcohol (a fatty alcohol) with erucic acid (a long-chain fatty acid derived from rapeseed oil). It is a synthetic ingredient designed to mimic the skin-softening properties of natural oils without the greasy feel.
How it works
It works by depositing a thin, non-occlusive layer on the skin's surface, which helps lock in moisture and improve skin texture. It also reduces friction, making it useful in lip products and hair conditioners for a smooth, silky feel.
Pros
Lightweight feel
Unlike heavy oils, Stearyl Erucate absorbs quickly and leaves skin feeling silky, not sticky or greasy.
Low irritation risk
It is considered very gentle and is unlikely to cause redness, stinging, or breakouts, making it suitable for sensitive skin.
Cons and cautions
Synthetic origin
It is lab-made, which may be a turn-off for those seeking 100% natural or plant-derived ingredients.
Limited research
While safety data exists, there are fewer studies on Stearyl Erucate compared to more common emollients like shea butter or squalane.
Best for
- People with dry or normal skin looking for a lightweight moisturizer
- Those with sensitive or acne-prone skin who want a non-comedogenic emollient
Use caution if
- Individuals with a known allergy to rapeseed oil derivatives (rare)
Usage tips
Safety summary
Stearyl Erucate is widely regarded as safe for topical use. It has low irritation and comedogenic potential, and no significant toxicity has been reported in cosmetic concentrations. The Cosmetic Ingredient Review (CIR) panel has reviewed similar esters and found them safe.
Research notes
Research on Stearyl Erucate specifically is limited, but it belongs to a well-studied class of fatty esters. Studies on similar esters show they are safe, non-irritating, and effective emollients. The erucic acid component is generally recognized as safe in small amounts.
Common label clues
- Typical concentration
- 1% to 10%
- Regulatory status
- Approved for use in cosmetics in the US (FDA) and EU (CosIng) with no known restrictions at typical concentrations.
- Common uses
- Moisturizers, Lip products, Hair conditioners, Makeup
- Environmental note
- Stearyl Erucate is biodegradable and not considered a significant environmental concern, though its synthetic production involves chemical processing.
Good to know
- Stearyl Erucate is often used in lip products because it provides a smooth, non-tacky glide.
- It is considered biodegradable and has a low environmental impact compared to some silicone-based emollients.
Common questions
What is Stearyl Erucate in beauty products?
Stearyl Erucate is a synthetic ingredient made from stearyl alcohol and erucic acid (a fatty acid found in rapeseed oil). In skincare, it acts as an emollient, meaning it helps soften and smooth the skin by forming a light, breathable film that reduces water loss. It feels silky and non-greasy, making it popular in moisturizers, lip balms, and hair products. It is considered very safe and unlikely to cause irritation or breakouts.
What does Stearyl Erucate do in a beauty product?
It works by depositing a thin, non-occlusive layer on the skin's surface, which helps lock in moisture and improve skin texture. It also reduces friction, making it useful in lip products and hair conditioners for a smooth, silky feel.
Is Stearyl Erucate safe for most people?
Stearyl Erucate is widely regarded as safe for topical use. It has low irritation and comedogenic potential, and no significant toxicity has been reported in cosmetic concentrations. The Cosmetic Ingredient Review (CIR) panel has reviewed similar esters and found them safe.
Who should be careful with Stearyl Erucate?
Individuals with a known allergy to rapeseed oil derivatives (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.