Sodium Decylbenzenesulfonate
AKA “Sodium 4-decylbenzenesulfonate, Sodium p-decylbenzenesulfonate, UNII-Y4S9YCM177, Benzenesulfonic acid, sodium salt, HSDB 5889, EINECS 220-093-3, 4-Decylbenzenesulfonic acid
Synthetic
Ingredient Facts
Sodium decylbenzenesulfonate
AKA: Sodium 4-decylbenzenesulfonate, Sodium p-decylbenzenesulfonate, UNII-Y4S9YCM177, Benzenesulfonic acid, Sodium salt, HSDB 5889, EINECS 220-093-3, 4-Decylbenzenesulfonic acid
Synthetic · Cleansing · EWG: 4
Synthetic
Cleanser
Emulsifier
Medicated Active
Synthetic
Clean
A gentle cleanser that removes dirt and oil while helping blend water and oil-based ingredients together for a smooth, even texture.
Formula
C16H25NaO3S
Mol. Weight
320.40
CAS #
1322-98-1
State
White solid; [HSDB]
See origin →
Functions
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Surfactant Cleansing
Surfactant Emulsifying
Anti-Inflammatory
Antimicrobial
Fights Acne
Removes dirt and impurities
Lifts away dirt and oil
Mixes oil and water
Traditional Use
Developed in the mid-20th century as a benzene-ring sulfonated detergent. Created for industrial and household cleaning products before use in some cosmetic formulations for stronger cleansing action.
Skin Types
all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe w/Qualifications
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR