C10-40 Isoalkyl Acid Phytosterol Esters
AKA “Plant sterol ester, Conditioning agent
Synthetic
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Ingredient Facts
C10-40 isoalkyl acid phytosterol esters
AKA: Plant sterol ester, Conditioning agent
Synthetic · Emollient · EWG: 4
Synthetic
Emollient
Skin Conditioner
Hair Care
Synthetic
Clean
C10-40 Isoalkyl Acid Phytosterol Esters is a complex mixture of esters of phytosterol and C10-40 Isoalkyl Acid Science: Functions: Hair Conditioning, Skin Conditioning, Skin Conditioning - Emollient, Viscosity Controlling Safety Ratings: CIR: Safe as used
State
Solid
Synthetic
Botanical-Derived Synthetic. Typically derived from plant sources such as soybean, rapeseed, or tall oil containing phytosterols and fatty acids. Produced through esterification of phytosterols with C10-40 isoalkyl acids via chemical synthesis.
Functions
Hair Conditioning
Emollient
Viscosity Controlling
Benefits
Locks In Moisture
Traditional Use
Synthetic derivative combining isoalkyl acids with plant-derived phytosterols, developed in recent decades to combine the emollient benefits of plant sterols with the stability of synthetic compounds.
Skin Types
all-skin-types
Best For
Target
Dryness
Melanin-Rich Skin
Suitable
Pregnancy Safe
Yes
EWG Score4
CIR Safety Findings
medical-approval, all-shades-safe, Not a Sensitizer
Regulatory Status
USAunder review
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: CosIng · EWG · CIR