Sodium Naphthalenesulfonate

Sodium Naphthalenesulfonate 1
molecular structure · PubChem CID 23661868
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
OriginDerived from naphthalene, a polycyclic aromatic hydrocarbon obtained from coal tar or petroleum refining. Synthesized through sulfonation of naphthalene using sulfuric acid or oleum under controlled conditions.
2-Naphthalenesulfonic Acid, Sodium Salt
Formula
C10H7NaO3S
Mol. Weight
230.22
CAS #
532-02-5, 1321-69-3
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-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
4
CIR
Reviewed by CIR
Pregnancy
Caution
CIR Safety Findings
Not a Sensitizer
4 studies / 4 not sensitizing (CIR 304 and 336)
Eye Irritant in Testing
2 studies / 2 irritating / reactions minimal to corrosive (CIR 336)
Mixed Skin Irritation Results
4 studies / 3 mixed / 1 not irritating / reactions slight to mild (CIR 304 and 336)
Dermal Absorption 0.64–1.34%
in vitro / porcine ear skin in diffusion chambers / 339 ug SNS (1 ug/ul in deionized water) / 24 h / two experiments of four chambers (CIR 336)
Concentration Guide
CIR lists it as not reported to be in use.
CIR · 2019 survey
Regulatory Status
USAunder review
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR