Isopropyl Isostearate
An emollient ester. It softens, adds slip and a light film and improves application. Oily skin watches heavier esters.
Evidence by route
Topical application
A functional emollient. Safe; moderate comedogenicity.
- CIR Cosmetic Ingredient Review safety assessment
How to read tiers A–F
- BLimited evidence. One RCT or several controlled studies with limitations
Tolerability and safety
- Irritation potential
- Low
- Allergen risk
- Low
- Pregnancy
- Safe
- Suitable for
- Normal, Dry, Combination, Oily, Sensitive
About this ingredient
Isopropyl Isostearate is an ester of isostearic acid and isopropyl alcohol. INCI: Isopropyl Isostearate. In a formula it works as an emollient and solvent: it softens skin, gives a smooth slip, and helps dissolve and spread oils, pigments, and oily actives. It is a functional sensory component, not a skincare active. Pregnancy safety. Systemic absorption through intact skin is low and there is no evidence of harm. It can be used during pregnancy and lactation. Tolerance. Irritation and allergen potential are low, but isopropyl esters can be slightly comedogenic, so they are introduced more cautiously on very oily, acne-prone skin.
Frequently asked questions
Is Isopropyl Isostearate safe during pregnancy?
Isopropyl Isostearate is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
What skin types is Isopropyl Isostearate for?
Isopropyl Isostearate suits: normal, dry, combination, oily, sensitive.
What is Isopropyl Isostearate and what does it do in cosmetics?
An emollient ester.
Is Isopropyl Isostearate comedogenic?
On the Fulton scale 3/5 – moderate comedogenicity. For acne-prone skin, a rating of 3 or higher suggests choosing an alternative.
What's the INCI name for Isopropyl Isostearate?
The INCI name is Isopropyl Isostearate.
See Isopropyl Isostearate in a product composition right on the store page
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Ingredients in the same category
Isopropyl Lauroyl Sarcosinate, Isosorbide Dicaprylate, Isostearic Acid, Isostearyl Alcohol, Poly-L-Lysine, Triticum Vulgare Germ Extract, Caprylyl Caprylate/Caprate, Glyceryl Oleate
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