: Polyethylene glycol 1000 for synthesis. CAS 25322-68-3, pH 4 - 7 (100 g/l, H₂O, 20 °C).
: P 5734 (OTTO) Poly(ethylene glycol) 1000 Cas no 25322-68-3 - used to modify therapeutic proteins and peptides to increase their solubility and lower their toxicity. Polyethylene glycol (PEG) is a hydrophilic polymer. It can be easily synthesized by the anionic ring opening polymerization of ethylene oxide, into a range molecular weights and variety of end groups.