1,5-pentanediol

1,5-Pentanediol (CAS 111-29-5), also known as pentamethylene glycol, is a bifunctional diol used as a reactive building block and process solvent across polymer, personal care, and specialty chemical manufacturing. Its two terminal hydroxyl groups make it a practical monomer for condensation reactions and a functional carrier in formulation work. In polymer production, it reacts with diisocyanates or diacids to build polyurethane and polyester chains.

This chemical influences flexibility and molecular weight in coatings, adhesives, and elastomers. Personal care formulators incorporate it as a humectant and solvent in skin-conditioning products where it supports ingredient solubilization. It provides moisture retention without the heaviness of longer-chain glycols. In plasticizer and cross-linking applications, it acts as a chain extender or curing co-agent in specialty resins and films for industrial use.

Food and flavor manufacturers use it as a carrier solvent for flavor concentrates and aroma compounds. This is particularly useful where regulatory-compliant glycol solvents are required for specific manufacturing processes. 1,5-Pentanediol is supplied as a clear, low-viscosity liquid in drum and IBC quantities. Technical grade is the standard commercial offering, with high-purity grades available for personal care and food-contact applications.

Buyers should confirm purity specifications and relevant compliance documentation based on end-use requirements. This includes checking for FCC or other food-grade certifications to ensure the material meets all safety standards.