Category:
Intermediates&Fine Chemicals
CAS NO:
na
Standard:
In-house Standards,
Methoxy PEG Succinimidyl Carboxymethyl Ester is a heterobifunctional PEG reagent used for protein conjugation. It features an N-hydroxysuccinimide (NHS) ester group reacting with primary amines and a carboxymethyl moiety for further modification. The compound typically follows the formula CnH2n+1Om(CH2CH2O)kCOOH. Specific CAS numbers vary by PEG chain length, commonly ranging from 87056-40-4 to higher homologs.
Store at -20°C under inert atmosphere to prevent hydrolysis. Avoid skin contact as NHS esters are potential sensitizers. Not intended for direct clinical administration; requires purification before use in pharmaceutical formulations.