Sodium Naphthalenesulfonate

AKA: Sodium 1-naphthalenesulfonate, 130-14-3, 1-Naphthalenesulfonic acid, Sodium salt, Sodium salt (1:1), Sodium alpha-naphthalenesulfonate, Sodium alpha-naphthalenesulfonic acid, Sodium alpha-naphthylsulfonate
Synthetic
Cleanser
Not Clean
2-Naphthalenesulfonic Acid, Sodium Salt
Formula
C10H7NaO3S
Mol. Weight
230.22
CAS #
532-02-5, 1321-69-3
Form
Liquid
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
Traditional Use
A synthetic aromatic compound developed for industrial and cosmetic use. Functions as a pH buffer or solubilizing agent in modern cosmetic formulations.
EWG
4
CIR
Reviewed by CIR
Pregnancy
Caution
CIR Safety Findings
all-shades-safe
Regulatory Status
USAunder review
EUrestricted
JAPANrestricted
CANADArestricted
Skin Types
all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Caution
The paper trail
🔬Peer-reviewed1 paper
⚖️Regulatory1 listing
🛡️Safety-assessed2 reviews
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR