Methoxy PEG Succinimidyl Succinamide


PEG products with additional MW may be made to order, please contact us for details


Methoxy PEG Succinimidyl Succinamide with superior quality specification of ≥95% Substitution.

JenKem Technology’s Methoxy PEG Succinimidyl Succinamide (Methoxy PEG SSA) is a high quality amine reactive PEG product with a stable non-degradable linker between the PEG polymeric chain and the NHS ester. Methoxy PEG Succinimidyl Succinamide reacts with the amine group of lysine(s) such as on the active ingredients of Adagen®, Pegademase, or PEG-adenosine deaminase, at pH 7-8. Methoxy PEG Succinimidyl Succinamide has a longer hydrolysis half-life compared with M-PEG-SCM. JenKem Technology offers Methoxy PEG SSA with MW 5000 Da (M-SSA-5000), and MW 20000 Da (M-SSA-20K), in 1g and 10g packing sizes.

Different MW of Methoxy PEG SSA products may be available by custom synthesis, please email us at for details on custom PEGs. Other linear JenKem NHS ester PEGs are available – if interested please select stable linker NHS PEGs, carbonate linker stable NHS PEGs, or cleavable linker NHS PEGs. JenKem Technology provides repackaging services for an additional fee, please contact us if you require a different package size than our catalog selection.

Bulk PEGs and GMP grade PEGs are made-to-order. Please contact us for bulk pricing.

Click here to download the MSDS


1. Fahrländer E., et al., PEGylated human serum albumin (HSA) nanoparticles: preparation, characterization and quantification of the PEGylation extent, Nanotechnology, 2015, 26(14):145103.

2. Li, C., et al., Real-Time Monitoring Surface Chemistry-Dependent In Vivo Behaviors of Protein Nanocages via Encapsulating an NIR-II Ag2S Quantum Dot, ACS Nano, 2015, 9 (12), 12255-12263.

3. Hoffman, M.D., et al., Degradable hydrogels for spatiotemporal control of mesenchymal stem cells localized at decellularized bone allografts. Acta Biomaterialia, 2014, 10(8): p. 3431-3441.

Founded in 2001 by experts in PEG synthesis and PEGylation, JenKem Technology specializes exclusively in the development and manufacturing of high quality polyethylene glycol (PEG) products and derivatives, and related custom synthesis and PEGylation services. JenKem Technology is ISO 9001 and ISO 13485 certified, and adheres to ICH Q7A guidelines for GMP manufacture. The production of JenKem® PEGs is back-integrated to in-house polymerization from ethylene oxide, enabling facile traceability for regulated customers. JenKem Technology caters to the PEGylation needs of the pharmaceutical, biotechnology, medical device and diagnostics, and emerging chemical specialty markets, from laboratory scale through large commercial scale.

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