In the highly competitive landscape of contemporary cosmetics formulation, 2-Pentyl Glycol (commonly designated by its INCI nomenclature as Pentylene Glycol or IUPAC 1,2-Pentanediol, CAS: 5343-92-0) stands as a cornerstone multifunctional ingredient. As a short-chain 1,2-alkanediol with the molecular formula C5H12O2, this small molecule combines a hydrophilic diol head with a short, lipophilic aliphatic tail. This unique structural duality gives it excellent amphiphilic properties, making it an essential component in modern skin and hair care products.
Unlike longer-chain glycols, such as 1,2-Octanediol, Pentylene Glycol offers high water solubility and a lightweight skin feel without leaving a greasy residue. This profile is essential for formulating modern, light skincare products like facial mists, hydrogels, and fast-absorbing emulsions. As a leading supplier and exporter, Suzhou Yuantairun Chemical Co., Ltd. provides cosmetic manufacturers with high-purity, low-odor 1,2-Pentanediol to ensure stability, safety, and excellent performance in finished personal care formulations.
Modern cosmetic formulation prioritizes multifunctionality. Brands look for ingredients that can replace single-purpose additives to simplify ingredient lists and reduce potential skin irritation.
Due to its hygroscopic hydroxyl groups, 1,2-Pentanediol binds water within the stratum corneum. Its small molecular volume allows it to penetrate deep into the upper layers of the epidermis, providing instant and long-lasting hydration without the heavy feeling of larger glycols.
Formulators face challenges when dissolving lipophilic actives like salicylic acid, ferulic acid, ceramides, and herbal extracts. Pentylene Glycol acts as a coupling agent and co-solvent, stabilizing these components in aqueous phases and preventing crystallization over time.
By reducing water activity and disrupting the cell membranes of bacteria, yeasts, and molds, 1,2-Pentanediol boosts the efficacy of traditional preservatives. This synergy allows formulators to reduce concentrations of ingredients like Phenoxyethanol.
In the green beauty and clean cosmetics movements, brands aim for "preservative-free" or "alternative preservation" claims. 1,2-Pentanediol plays a key role in these systems. It destabilizes microbial membranes, allowing co-ingredients to enter cells and neutralize pathogens more effectively.
Studies show that combining 1,2-Pentanediol with other alkanediols (such as 1,2-Hexanediol or Caprylyl Glycol) or organic acids (like Sodium Benzoate or Levulinic Acid) creates a broad-spectrum preservation system. This system remains stable across a wide pH range (3.0 - 9.0), making it versatile for both acidic active peels and neutral emulsions.
| Target Microorganism | MIC (%) of Pentylene Glycol Alone | MIC (%) in combination with 0.3% Caprylyl Glycol | Formulation Benefit |
|---|---|---|---|
| Escherichia coli (Gram-negative) | 1.5% - 2.0% | 0.4% - 0.6% | Enhanced protection against bacterial contamination during consumer use. |
| Pseudomonas aeruginosa (Gram-negative) | 1.2% - 1.8% | 0.3% - 0.5% | Improved safety for eye-area cosmetics. |
| Staphylococcus aureus (Gram-positive) | 1.5% - 2.0% | 0.5% - 0.7% | Secures skin barrier and topical creams. |
| Candida albicans (Yeast) | 2.0% - 2.5% | 0.6% - 0.8% | Reduces risk of fungal growth in high-humidity bathroom environments. |
| Aspergillus niger (Mold) | 2.5% - 3.0% | 0.8% - 1.0% | Controls spoilage in organic/botanical extract systems. |
In addition to boosting preservation, Pentylene Glycol acts as a penetration enhancer. By temporarily modifying the lipid bilayer of the skin, it helps active ingredients (such as Vitamin C derivatives, Niacinamide, and Peptides) reach deeper epidermal layers, improving the clinical efficacy of anti-aging and brightening formulas.
Suzhou Yuantairun Chemical Co., Ltd. (YTR) leverages advanced manufacturing and supply chain infrastructure to deliver high-quality, high-purity cosmetic raw materials globally. By sourcing raw materials directly from reliable producers, we manage quality and costs at every step.
Our state-of-the-art distillation processes remove trace impurities, such as heavy metals and free aldehydes. This ensures our 1,2-Pentanediol has almost no odor, making it suitable for unfragranced, hypoallergenic skincare formulas.
Exporting cosmetic ingredients requires meeting strict regulatory standards across different regions. Suzhou Yuantairun Chemical Co., Ltd. ensures all materials meet international compliance guidelines, providing smooth access to global markets.
We provide full documentation, including Certificate of Analysis (COA), Technical Data Sheets (TDS), Safety Data Sheets (SDS) compliant with GHS, and heavy metal testing reports, ensuring seamless integration into your Quality Assurance workflows.
Suzhou Yuantairun Chemical Co., Ltd. drives innovation and efficiency in the global daily chemical industry by providing cutting-edge solutions tailored to our clients' needs.
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Advantage: ECOCERT certified surfactants that clean gently without stripping natural skin moisture.
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Find answers to technical, formulation, and commercial questions about 1,2-Pentanediol (CAS 5343-92-0).
1,2-Pentanediol, often referred to in trade as Pentylene Glycol or 2-Pentyl Glycol, is a five-carbon straight-chain diol with hydroxyl groups at the 1 and 2 positions. This structure makes it highly hydrophilic (water-binding) while retaining enough lipophilicity to interact with lipid membranes, giving it both moisturizing and antimicrobial properties.
It works by reducing water activity in the formula and disrupting the cellular membranes of microbes. This allows formulators to use lower concentrations of traditional preservatives like Phenoxyethanol or Benzyl Alcohol while maintaining reliable antimicrobial protection.
Yes. When purified to cosmetic grade (≥99.5% purity) with low trace odor and no residual aldehydes, 1,2-Pentanediol has a low irritation profile. It is widely used in sensitive skin formulations and baby wipes to replace more sensitizing glycol alternatives.
Typical usage levels range from 1.0% to 5.0%. When used purely as a humectant and solvent, 1.0% to 3.0% is sufficient. To use it as a preservative booster or co-preservative, levels between 3.0% and 5.0% are recommended, depending on the overall formulation design.
The standard shelf life is 24 months from the date of manufacture when stored in original, unopened packaging. It should be kept in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and strong oxidizing agents.
Yes. We offer flexible packaging options including 25kg drums, 200kg plastic/iron drums, and 1000kg IBC tanks. Our logistics team coordinates sea, air, and rail freight to support Just-In-Time delivery requirements for manufacturers worldwide.
