Propanediol 1,3

A multifunctional, plant-derived humectant and solvent widely used in cosmetics, personal care, and pharmaceutical formulations—often as a cleaner, skin-friendly alternative to propylene glycol.

INCI name: Propanediol 1,3

Chemical name: 1,3-Propanediol

Source: Usually bio-based (corn sugar fermentation)
Appearance: Clear, colorless liquid
Odor: Odorless
Texture: Slightly viscous, non-sticky

Propanediol 1,3 functions in cosmetics:

• Humectant – draws moisture into skin & hair
• Solvent – dissolves actives (salicylic acid, botanical extracts, preservatives)
• Penetration enhancer – improves delivery of actives
• Preservative booster – enhances efficacy of preservatives
• Propylene glycol alternative – gentler and more eco-friendly

💆‍♀️ Benefits for Skin

• Improves hydration without tackiness
• Suitable for sensitive & acne-prone skin
• Reduces irritation often linked to propylene glycol
• Enhances sensory feel of gels, toners & serums

💇‍♀️ Benefits for Hair

• Moisturizes hair shaft
• Improves slip and softness
• Reduces frizz
• Supports scalp health in leave-on products

Typical Usage Levels

• Toners & serums 1–10%
• Creams & lotions 1–5%
• Cleansers 1–3%
• Hair products 1–5%
• Deodorants 3–10%

Solubility & Compatibility
✅ Water-soluble
✅ Alcohol-soluble

Compatible with:

• Niacinamide
• Salicylic acid (predissolved)
• Hyaluronic acid
• Botanical extracts

⚠️ Safety Profile

• Low irritation potential
• Non-comedogenic
• Suitable for leave-on and rinse-off products
• Approved globally for cosmetic use
• Safe for sensitive skin & baby products

Common Application

• Hydrating toners
• Acne serums
• Exfoliating solutions
• Creams & lotions
• Deodorants
• Hair tonics & scalp serums