1,2-Pentanediol | Pentylene Glycol, the secret weapon for preservative-free products
- 2026-01-23
- 7
- Weicheng Advanced Material (Shandong) Co., Ltd.
Truly safe and effective skincare products may contain a super ingredient – 1,2-pentanediol! It is not only a powerful member of the polyol family, but also a treasure trove of ingredients for gentle, cosmetic-grade skincare.

What is 1,2-Pentanediol?
It's actually a powerful member of the polyol family, offering both moisturizing and antibacterial benefits!
It's a naturally derived, multifunctional ingredient commonly found in plant fermentation products. Unlike traditional preservatives (such as phenoxyethanol and parabens), it's gentle enough for sensitive skin care. It possesses moisturizing, antibacterial, and solvent functions, making it a truly versatile ingredient in formulations!
1,2-Pentanediol is often used as a substitute for chemical preservatives.
Why is it considered the best partner for "preservative-free" products?
More and more women are pursuing "zero irritation," making "preservative-free" products highly sought after in the skincare industry. But a question arises—how can we ensure products don't mold or spoil without preservatives? This is where 1,2-Pentanediol comes in!
1,2-Pentanediol | Advantages
Its antibacterial properties are excellent, effectively inhibiting the growth of bacteria and fungi. It also boasts superior moisturizing power, leaving a refreshing and non-sticky feel on the skin, unlike the heavy feel of glycerin. Furthermore, it helps other active ingredients dissolve and absorb better, enhancing the overall user experience. Real user experience: I formulated my own toner, and adding 1,2-Pentanediol not only resulted in excellent stability but also made the skin feel incredibly light. It doesn't clog pores at all in summer! Even sensitive skin can use it with confidence!
Natural, additive-free preservative-free 1,2-pentanediol (INCI Pentylene Glycol CAS NO. 5343-92-0) Appearance: Colorless, transparent liquid
1,2-Pentanediol is produced through processing, refining, and purification using plant-based raw materials. It is completely free of 1,2-epoxypentane and peroxides, as well as potentially irritating short-chain unsaturated fatty acids. Compared to chemically synthesized 1,2-pentanediol, it is gentler and safer. 1,2-Pentanediol is COSMOS certified natural. Adding 4% or more to cosmetic formulations provides broad-spectrum antibacterial and preservative effects. Besides being marketed as natural and preservative-free, it also increases skin hydration, adjusts product viscosity, improves the water resistance of sunscreens, and enhances skin's water-binding capacity, increasing hydration.
Recommended pH range: 3-9
Recommended heating temperature: <100℃
Recommended dosage: 4.0-5.0%
Recommended applications: Skin and hair care (masks, baby care products, sunscreens, and other skincare products). Especially suitable for sensitive skin.














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