PEG products with different MW and functional groups may be made to order, please contact us for details


MPEG2  NHS Ester with superior quality specification of ≥95% Substitution.

MPEG2 NHS Ester from JenKem Technology is an NHS functionalized U-shaped branched 2ARM PEG, reactive towards the amino group of lysine(s), such as lysine present on interferon alpha-2a, or towards aptamers [1]. JenKem Technology offers MPEG2-NHS with MW 20000 and MW 40000, in 1g and 10g packing sizes.  Different MW of MPEG2 NHS Ester products may be available by custom synthesis, please email us at for details. 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.

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 directly 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.

Synonyms: MPEG2-NHS-40K, MPEG2-LYS-NHS-40K,  or (MPEG)2-LYS-NHS-40k; MPEG2-NHS-20K, MPEG2-LYS-NHS-20K,  or (MPEG)2-LYS-NHS-20k; MPEG2 Lysine NHS.

  1. Ma, G., PEGylated drugs: Concept, Design and Application, Science Press, 2016:302.

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