1,2-BUTANEDIOL

Humectant

82

Good

CAS Number: 584-03-2

About 1,2-BUTANEDIOL

A humectant solvent that helps keep formulas hydrated and usually behaves much more gently than older harsh solvents.

Detailed Analysis

1,2-Butanediol is a small glycol used as a humectant, solvent, and preservative booster. It is generally well tolerated in cosmetics, though the supplied eye-irritation classification supports avoiding an ultra-perfect score. In practice it is a fairly low-concern multifunctional ingredient when used at normal levels.

What It Does

HUMECTANT SKIN CONDITIONING SOLVENT VISCOSITY CONTROLLING

Skin Benefits

  • ✓ Hydration
  • ✓ Helps reduce water loss

Known Concerns

  • ⚠ Can irritate eyes at higher concentrations

Safety Score

82

Good

Based on EU regulatory data, published safety research, and ingredient function analysis.

References

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EU CosIng Database

European Commission cosmetic ingredient registry

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This information is for educational purposes only and does not constitute medical advice. Always consult a healthcare professional for skin concerns or allergies.