Isostearic Acid
Isostearic Acid is a surfactant and cleansing ingredient. It’s in 71 products on Poliage, most often lip, mascara and concealer. Avoid lists on Poliage that include it: none.
Updated October 22, 2026
In plain English
Isostearic acid: used to wash skin or hair and hold ingredients together.
What it does
Contains Isostearic Acid: binding
Function listed in CosIng
Contains Isostearic Acid: cleansing
Function listed in CosIng
Contains Isostearic Acid: emulsifying
Function listed in CosIng
Contains Isostearic Acid: surfactant
Function listed in CosIng
Source: CosIng, the European Commission cosmetic ingredient database, ref 77840, accessed October 22, 2026. Also listed as isooctadecanoic acid.
Products that contain Isostearic Acid
Shiseido
Perfect Cleansing Oil
Lists fragrance, drying alcohol
SHEGLAM
Perfect Skin High Coverage Concealer
Concealer · Lists silicones
Wet n Wild
Photo Focus Concealer
Concealer · Lists silicones
Victoria Beckham Beauty
Posh Balm
Lip · None of Poliage’s flag groups listed
Dermalogica
Powerbright Overnight Cream
Moisturizer · Lists fragrance allergens, essential oils, silicones
NARS
Powermatte High-Intensity Lip Pencil
Lip · Lists silicones
ColourPop
Pretty Fresh Tinted Foundation Balm
Foundation · Lists silicones
NARS
Radiant Creamy Concealer
Concealer · Lists silicones
NARS
Sheer Glow Foundation
Foundation · Lists silicones
Cetaphil
Sheer Mineral Sunscreen Stick SPF 50
Sunscreen · Lists silicones
Sun Bum
Signature SPF 50 Mineral Lotion
Sunscreen · Lists coconut derivatives
Counter
Skin Twin Featherweight Foundation
Foundation · Lists exfoliating acid, silicones, coconut derivatives
MAC
Skinfinisher Sunstruck Matte Bronzer STJR-06
None of Poliage’s flag groups listed
Jane Iredale
Skintuition Brightening Under Eye Concealer with Active Peptide Complex
Concealer · Lists silicones, coconut derivatives
Fenty Beauty
Soft’lit Naturally Luminous Longwear Foundation
Foundation · Lists silicones
Dermalogica
Super Rich Repair
Moisturizer · Lists fragrance allergens, essential oils, silicones, coconut derivatives
Hero Cosmetics
Superlight Sunscreen SPF 30
Sunscreen · Lists coconut derivatives
Westman Atelier
Suprême Bio-Complex Liquid Foundation
Foundation · Lists coconut derivatives
Tatcha
The Brightening Serum
Serum · Lists fragrance, fragrance allergens, essential oils
Tatcha
The Silk Peony
Eye cream · Lists fragrance, fragrance allergens, exfoliating acid, silicones
SHEGLAM
Violet Flush Blush
Blush · Lists fragrance, fragrance allergens
The Body Shop
Vitamin C Concealer
Concealer · Lists fragrance, fragrance allergens, drying alcohol, coconut derivatives
Derma E
Vitamin C Weightless Moisturizer SPF 45
Sunscreen · Lists fragrance, coconut derivatives
PreviousPage 3
Related guides
How to read an ingredient list
What the ingredient list on a beauty product tells you, what the names mean, and what it leaves out, using FDA and EU labeling rules.
Does ingredient order show how much is in a product?
Ingredient lists run from most to least, but only down to 1%. Below that, any order is allowed. What the order shows and what it hides.
How do you patch test a new product?
What the AAD, FDA and DermNet say about testing a small area, the FDA hair dye skin test, in-office patch tests, and contact allergy basics.