Potassium Toluenesulfonate

AKA: 16106-44-8, Potassium p-toluenesulfonate, Potassium 4-methylbenzenesulfonate, Potassium tosylate, Benzenesulfonic acid, Potassium salt, ELTESOL PT40
Synthetic
Cleanser
Not Clean
OriginProduced from toluene, a hydrocarbon derived from petroleum or coal tar, through sulfonation reactions. Synthesized by treating toluene with sulfuric acid and potassium compounds to create the salt.
Potassium toluene-4-sulphonate
Formula
C7H7KO3S
Mol. Weight
210.29
CAS #
16106-44-8
Form
Liquid
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Caution
Functions
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Hydrotrope
Cleansing Surfactant
Surfactant Hydrotrope
Lifts away dirt and oil
Improves ingredient solubility
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
4
CIR
Safe as used
Pregnancy
Caution
CIR Safety Findings
Not a Skin Irritant (CIR report on the ingredient group)
CIR report statement covering this group of ingredients / not tested individually (CIR 496)
Eye Irritant in Testing
2 studies / 2 irritating / reactions slight (CIR 496)
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR