Description

Polyethylene glycol 400 (PEG 400) is a low-molecular-weight grade of polyethylene glycol with a low-level toxicity. It is very hydrophilic, which renders it a useful ingredient in drug formulations to augment the solubility and bioavailability of weakly water-soluble drugs. It is used in ophthalmic solutions for the relief of burning, irritation and/or discomfort that follows dryness of the eye. PEG “400” indicates that the average molecular weight of the specific PEG is 400