Overview
1,2-Pentanediol is a diol compound belonging to the glycol family, characterized by its two hydroxyl groups on adjacent carbon atoms. It's widely recognized for its dual functionality as both a humectant and solvent. In industrial terms, it bridges the gap between short-chain glycols (like propylene glycol) and longer-chain compounds, offering balanced properties of solubility and viscosity. Its production typically involves the hydrolysis of pentene oxide or catalytic hydrogenation of glutaric acid derivatives.
Physical and Chemical Properties
As a moderately viscous liquid, 1,2-pentanediol demonstrates excellent hygroscopicity, making it effective for moisture retention in formulations. Its freezing point below -50°C ensures stability in cold climates. The compound's amphiphilic nature (containing both hydrophilic and hydrophobic regions) enables it to act as a co-solvent for diverse formulations. It shows exceptional stability under normal conditions, with no tendency to polymerize or decompose when stored properly. The pH of aqueous solutions is typically neutral (6-8).
Main Applications
In cosmetics, 1,2-pentanediol serves as a multi-functional ingredient in skincare products (toners, serums) where it provides hydration, enhances active ingredient penetration, and exhibits mild preservative properties. Pharmaceutical applications include its use as an excipient in topical medications and as a solvent for poorly water-soluble drugs. Industrially, it functions as a precursor for plasticizers and finds use in specialty coatings where slow evaporation rates are desired.
Safety and Storage
While classified as low toxicity (LD50 > 2000 mg/kg oral, rat), proper handling with nitrile gloves and eye protection is recommended for bulk quantities. Spills should be contained with absorbent materials. For long-term storage, stainless steel or HDPE containers are preferred. The product remains stable for at least two years when kept in original sealed containers at temperatures below 30°C. Incompatibilities include strong oxidizing agents and concentrated mineral acids.
B2B Procurement Guide
Industrial buyers should specify required purity levels: cosmetic grade (≥99.5%), pharmaceutical grade (with additional heavy metal testing), or technical grade (≥98%). Key procurement considerations include batch consistency documentation, supply chain reliability (as production is concentrated in few regions), and sustainability certifications. Bulk shipments (ISO tanks or 200kg drums) typically offer 15-30% cost savings compared to retail packaging.
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