Hydrolyzed Sulfonated Keratin
AKA “Sulfonated Keratin, Hydrolyzed Keratin
Emollient
Ingredient Facts
Hydrolyzed sulfonated keratin
AKA: Hydrolyzed Keratin
Emollient · Emollient · EWG: 4
Synthetic
Humectant
Emollient
Skin Conditioner
Hair Care
Not Clean
Hydrolyzed Sulfonated Keratin is the hydrolysate of Sulfonated Wool derived by acid, enzyme or other method of hydrolysis
CAS #
-
Form
Liquid
See origin →
Functions
Hair Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Humectant
A moisture magnet. Pulls water from the air and deeper skin layers up to the surface to keep skin plump and hydrated.
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Locks In Moisture
Traditional Use
Developed in the mid-20th century as a processed form of keratin protein extracted from animal hair and nails. Used in modern haircare and skincare products to strengthen hair and improve skin barrier function, replacing traditional protein-rich treatments.
Skin Types
all-skin-types
Best For
Rough Texture
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not an Irritant
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Jun 2026
Data: CosIng · EWG · CIR