Octaethylene glycol

Octaethylene glycol (CAS 5117-19-1), commonly abbreviated as PEG-8, is a mid-chain polyethylene glycol used across personal care, pharmaceutical, and industrial formulations. It functions as a solvent, humectant, and emulsifier, bridging water-soluble and lipophilic components in complex systems. In personal care formulations, PEG-8 acts as a humectant and carrier, improving moisture retention and enhancing the spreadability of creams, lotions, and serums. Pharmaceutical manufacturers use it as a solubilizer and vehicle for active ingredients.

In topical and oral preparations, consistent molecular weight distribution is critical for dosing accuracy. In printing inks and coatings, it improves pigment dispersion and controls viscosity to meet specific substrate adhesion requirements. Metalworking and industrial lubricant formulators incorporate it into water-based cutting fluids and process lubricants to reduce friction and improve tool life. This versatility makes it a staple in modern chemical manufacturing processes.

Octaethylene glycol is supplied as a clear, viscous liquid. It is available in pharmaceutical-grade specifications including USP and BP, as well as cosmetic-grade and technical-grade options depending on purity requirements. Packaging typically ranges from drums to intermediate bulk containers, with high-purity grades supplied for regulated pharmaceutical and personal care applications. Proper storage ensures the stability and longevity of the chemical profile.