Ingredient review
Isopropyl Stearate
INCI: ISOPROPYL STEARATE
A lightweight emollient that softens skin but may clog pores for some people.
In plain English
Isopropyl Stearate is a synthetic oil-like ingredient made from isopropyl alcohol and stearic acid (a fatty acid found in plants and animals). It spreads easily on skin, leaving a smooth, non-greasy feel. However, it has a moderate risk of clogging pores, so it may not be ideal for acne-prone 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.
Main practical flags: irritation is low; clogging risk is moderate.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- moderate
Quick decision guide
Useful, but context matters
Isopropyl Stearate can be useful, but watch for possible clogging concerns.
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 Isopropyl Stearate.
- 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
moderateMay be fine for many users but deserves caution if you are breakout-prone.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
Isopropyl Stearate is an ester formed by combining isopropyl alcohol with stearic acid. It is a clear, oily liquid used in cosmetics to improve texture and skin feel.
How it works
It sits on the skin's surface, reducing water loss and making the skin feel softer and smoother. It also helps other ingredients spread evenly and gives products a silky, lightweight texture.
Pros
Lightweight feel
Leaves skin smooth without a heavy or greasy residue, making it pleasant for daily use.
Improves product texture
Helps creams and lotions spread evenly and feel silky on application.
Cons and cautions
May clog pores
Rated moderate on the comedogenic scale, so it can trigger breakouts in acne-prone individuals.
Synthetic origin
Derived from petrochemicals, which may be a concern for those seeking natural or plant-based ingredients.
Best for
- People with dry or normal skin looking for a lightweight moisturizer
- Those who enjoy a silky, non-greasy finish in creams and lotions
Use caution if
- Individuals with acne-prone or oily skin who are sensitive to pore-clogging ingredients
Usage tips
Safety summary
Isopropyl Stearate is considered safe for use in cosmetics at typical concentrations. It has low irritation potential but moderate comedogenic risk, meaning it may cause breakouts in some individuals.
Research notes
Studies confirm its safety as a skin conditioning agent. Comedogenicity ratings are based on historical rabbit ear tests and human patch tests, showing moderate pore-clogging potential.
Common label clues
- Typical concentration
- 1% to 10%
- Regulatory status
- Approved for use in cosmetics by the FDA and the European Commission, with no known restrictions at typical concentrations.
- Common uses
- Moisturizers, Creams, Lotions, Makeup, Sunscreens
- Environmental note
- As a synthetic ester, it is not biodegradable and may accumulate in the environment, though it is used in small amounts.
Good to know
- Isopropyl Stearate is often used in makeup removers and foundations for its smooth application.
- It is different from Isopropyl Myristate, which has a similar name but different properties.
Common questions
What is Isopropyl Stearate in beauty products?
Isopropyl Stearate is a synthetic oil-like ingredient made from isopropyl alcohol and stearic acid (a fatty acid found in plants and animals). It spreads easily on skin, leaving a smooth, non-greasy feel. However, it has a moderate risk of clogging pores, so it may not be ideal for acne-prone skin.
What does Isopropyl Stearate do in a beauty product?
It sits on the skin's surface, reducing water loss and making the skin feel softer and smoother. It also helps other ingredients spread evenly and gives products a silky, lightweight texture.
Is Isopropyl Stearate safe for most people?
Isopropyl Stearate is considered safe for use in cosmetics at typical concentrations. It has low irritation potential but moderate comedogenic risk, meaning it may cause breakouts in some individuals.
Who should be careful with Isopropyl Stearate?
Individuals with acne-prone or oily skin who are sensitive to pore-clogging ingredients
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.