The price and suitability of PEG 400 are heavily influenced by its purity level:

PEG 400 is available through various channels depending on the intended use and quantity:

: Required for oral, topical, and ophthalmic (eye care) formulations. It must meet strict purity standards like the PEG 400 USP monograph.

: Functions as a solvent and stabilizer, helping to dissolve active ingredients and fragrances into aqueous systems.