Palmitic acid-PEG4-acid is a saturated long-chain fatty acid with a 16-carbon backbone and a PEG likner connected to a terminal carboxylic acid group. The acid group can derivatize amine-containing molecules in the presence of activators such as EDC or HATU. The hydrophilic PEG spacer increases solubility in aqueous media. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.