Number of Ethylene Glycol Repeating Units n=113 (MW=5,000 Da) Number of Glutamic Acid Repeating Units x=50 (poly-L-glutamic acid sodium salt, MW=7,500 Da) Pack Size 100 mg, $300.00 500 mg, $1,200.00 Material Safety Data Sheets BOC-NH-PEG5K-b-PLE50 Specification Sheets BOC-NH-PEG5K-b-PLE50