Description

Propylene Glycol – Multi-Functional Humectant & Solvent for Advanced Formulation

Propylene Glycol is a clear, odorless, water-soluble liquid widely used in professional cosmetic formulation. Highly versatile, it functions as a humectant, solvent, penetration enhancer, emollient, and antimicrobial support ingredient.

In modern skincare and haircare, it plays a critical structural role,  improving hydration, dissolving challenging actives, enhancing delivery, and contributing to formula stability.

This is not just a filler ingredient. When used correctly, Propylene Glycol elevates formulation performance.

Technical Specifications

INCI: Propylene Glycol
Appearance: Colorless liquid with little to no odor
Solubility: Completely miscible in water
Recommended Usage Rate: 1% – 20%

Why Formulators Use Propylene Glycol

Powerful Humectant Performance

Propylene Glycol attracts and binds water to the outer layers of the skin, supporting hydration and improving visible smoothness.

As skin ages and Natural Moisturizing Factor (NMF) declines, humectants become critical. Propylene Glycol helps counter moisture loss and reduces the appearance of dryness, roughness, and fine lines.

Exceptional Solvent Capabilities

Many cosmetic actives are difficult to dissolve. Propylene Glycol effectively solubilizes ingredients such as:

• Salicylic Acid

• Ferulic Acid

• Allantoin

• Vitamin C

• Fragrances

• Pigments

This makes it indispensable in serums, toners, creams, and treatment products.

Penetration Enhancement

Propylene Glycol improves the delivery of active ingredients through the skin, increasing their effectiveness. It helps actives reach their target site more efficiently without adding greasiness.

Light Emollient Function

Forms a lightweight protective film on the skin that reduces transepidermal water loss (TEWL) while maintaining a smooth, non-sticky finish.

Antimicrobial Support

At higher concentrations, Propylene Glycol exhibits antimicrobial properties and contributes to overall formula preservation. (Note: It does not replace a complete preservative system in water-containing products.)

Suitable For

• Creams & lotions

• Serums & treatment gels

• Shampoos & conditioners

• Acne formulations

• Exfoliating treatments

• Pigmented cosmetic systems

• Non-oily and lightweight, it is suitable for acne-prone and oily skin types.

Pro Tips

Use Propylene Glycol strategically:

• For solubilizing actives: Pre-dissolve difficult ingredients in Propylene Glycol before adding to the water phase.

• For hydration boost: Combine with glycerin for layered humectant performance.

• For enhanced delivery: Keep usage between 3–10% in leave-on treatments to optimize penetration without tackiness.

• Always balance with soothing ingredients (like panthenol or allantoin) in high-performance formulas.

Overuse can increase stickiness or sensitivity in compromised skin, so optimize, don’t overload.

Disclaimer

For cosmetic formulation use only, not for internal or medical applications. Because many of our ingredients are naturally derived, slight variations in colour or texture may occur.

At Skin Foodie, we believe that what goes into your formulations should be as pure as what goes into your body. That’s why we source only ingredients that meet exceptional standards of purity, performance, and safety. Remember: not all ingredients are created equal, the same name or CAS number does not guarantee the same quality.