pH Adjuster
SULFONATED STYRENE/DVB CROSSPOLYMER
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A sulfonated, crosslinked styrene/divinylbenzene polymer used as an ion-binding or pH-control aid. Polymer safety is generally favorable, but residual monomer QC matters.
Sulfonated styrene/DVB crosspolymer is the same chemistry as strong-acid cation-exchange resins (think water softener beads) formulated for cosmetic use. The crosslinked network is too large to penetrate skin, and functional use is as a pH/ion adjuster or controlled-release matrix. Safety hinges on supplier quality control: residual styrene monomer (a possible human carcinogen, IARC 2A) and unreacted sulfonate groups must be below cosmetic thresholds. Not extensively reviewed by CIR, but related cosmetic sulfonated polymers have favorable safety records. The sulfonic-acid form is acidic and can sting compromised skin.
Function
Skin benefits
- Functional pH/ion management
Known concerns
- Residual styrene monomer requires supplier QC
- Acidic sulfonate can sting on damaged skin
- Limited specific CIR review
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related ph adjusters
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.