Polyethylene glycol (PEG) compounds contain a polyether unit, commonly expressed as R₁-(O-CH₂-CH₂)_n-O-R₂. They are generally biocompatible, non-toxic and stable in both organic and aqueous solutions, and so are extensively used in biological applications, as well as nanotechnology and materials research. Proteins with PEG chain modifications and compounds encapsulated in PEG liposomes exhibit a longer half-life in vivo than their non-PEGylated counterparts, a phenomenon known as PEG shielding. Functionalised PEG lipids and phospholipids can be used for protein-PEG conjugation.

4-Arm PEG-GAS is a multiarm PEG derivative with succinimidyl NHS ester groups at each terminal of the four arms connected to one pentaerythritol core. PEG-GAS (succinimidyl glutaramide ester) is one type of PEG-NHS reagents. There is a C3 hydrocarbon amide linkage between PEG and the NHS ester.

Target	4-Arm PEG-GAS
Form	Solid
Purity	≥ 95% (1H-NMR). Product conforms to structure by 1H-NMR.
Storage	Store between 0 and -5 °C. Avoid exposure to light. Ensure the vial lid is sealed when not in use.
Availability	Shipped within 7-15 working days.
Note	This product is for research use only. Not for human consumption, cosmetic, therapeutic or diagnostic use.

Research Articles on 4-Arm PEG-GAS