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pH Adjuster

SODIUM BORATE

CAS 1330-43-4 / 1303-96-4 Updated
22

Safety score · 0–100

Caution

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

About

Borax/sodium borate — once common as a buffer or emulsifier, now EU-restricted. Boron compounds are classified as reproductive toxins (CMR 1B).

Function

BUFFERING

Skin benefits

  • pH buffer at low concentrations
  • Mild antimicrobial
  • Traditional cosmetic use

Known concerns

  • EU CLP Annex VI: H360 may damage fertility/unborn child
  • CMR category 1B (boron compounds)
  • EU Cosmetics Annex III: restricted; not in products for children under 3 except baths
  • Skin/eye irritant at higher levels

References

EU

EU CosIng database

European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.

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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.