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1,2-BUTANEDIOL.

Valuable CAS 584-03-2 / HUMECTANT, SKIN CONDITIONING, SOLVENT, VISCOSITY CONTROLLING

1,2-Butanediol is a versatile diol functioning as a potent humectant, attracting and retaining skin moisture to enhance hydration and suppleness. It also optimizes cosmetic formulations by acting as a solvent and viscosity-controlling agent, thereby improving product stability and texture.

Humectant Skin conditioning agent Solvent Viscosity controlling agent Preservative booster

Science

Operating primarily as a humectant, 1,2-Butanediol actively binds and retains water within the stratum corneum, promoting deep hydration, softness, and improved skin elasticity. Beyond its moisturizing capabilities, it functions as a skin conditioning agent, contributing to a smoother and more refined skin surface. In formulations, it serves as an effective solvent, ensuring the uniform distribution of other ingredients and enhancing overall product efficacy. Furthermore, it aids in controlling product viscosity and has been shown to augment the antimicrobial efficacy of preservation systems.


Research

Low confidence
Effective range N/A
Optimal

N/A


Transparency

Not commonly dusted

The Formula

Solubility
Water
Optimal pH N/A
0 7 14

Stability

For optimal stability, store in a cool, dry, and well-ventilated area with the container tightly closed to prevent leakage.

Synergies

  • Boosts antimicrobial activity of preservatives

Conflicts

  • Strong oxidants

Safety

CIR Status
Safe as used
Sensitization risk Moderate

The Cosmetic Ingredient Review (CIR) Expert Panel has concluded 1,2-Butanediol is safe for use in cosmetics. However, safety data sheets indicate a potential for skin irritation (Category 2, H315), serious eye irritation (Category 2, H319), and a low risk of allergic skin reaction (Category 1, H317). Therefore, a preliminary patch test is recommended before widespread usage. Ingestion may lead to systemic illness.


Your Skin

Yes Normal
Yes Dry
Yes Oily
No Sensitive
Irritancy Moderate
Comedogenicity Unknown

Our Assessment

Valuable

1,2-Butanediol is a valuable multi-functional ingredient, enhancing skin hydration and formulation stability across various product types, though individual patch testing is advised due to potential for irritation or sensitization.


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