Propargyl-PEG4-CH2COOH NHS Ester

• Product Name: Propargyl-PEG4-CH2COOH NHS Ester
• Catalog Number: AG-1843
• CAS#: 2144777-76-2
• Molecular Formula: C15H21NO8
• Molecular Weight: 343.33
• Purity: > 90%*

Our NHS Ester maintains over 95% purity initially but may experience slight degradation over time due to its instability. However, we assure a minimum purity of over 90% upon shipping.