Methoxy PEG Acetic Acid


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



Methoxy PEG Acetic Acid with superior quality specification of ≥95% Substitution.

Methoxy PEG Acetic Acid from JenKem Technology is an Amine PEGylation reagent reactive towards the amino group of lysine(s) at pH 7-8. Methoxy PEG Acetic Acid is more stable than M-PEG-SCM. JenKem Technology offers Methoxy PEG Acetic Acid with MW 5000 (M-CM-5000), MW 10000 (M-CM-10K) and MW 20000 (M-CM-20K), in 1g and 10g packing sizes.

Different MW of Methoxy PEG Acetic Acid products may be available by custom synthesis, please email us at for details on custom 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 PEGs are also available upon request. Please contact us for special bulk pricing.

Click here to download the MSDS

Note: Starting July 2016, Methoxy PEG Acetic Acid is the new name of the product Methoxy PEG Carboxyl (MW 5000 (M-COOH-5000), MW 10000 (M-COOH-10K) and MW 20000 (M-COOH-20K)). JenKem Technology has revised the name of the product to better reflect the chemical structure, as many other PEG derivatives with a COOH group are offered in the 2016 JenKem USA catalog.  


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Founded in 2001 by recognized 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 on-site manufacturing from ethylene oxide, enabling facile traceability for GMP 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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