JenKem PEG RnDJenKem Technology provides high purity monodisperse (discrete) PEG raw materials and monodisperse (discrete) PEG derivatives with an extensive variety of functional groups, from grams to kilograms batch size in both non-GMP and GMP grade. JenKem Technology’s monodisperse PEG products consist of linear chains of up to 108 –CH2-CH2-O– units (MW ~ 5000Da).

JenKem Technology’s monodisperse PEG products are produced via very reproducible chemical reactions and lack the polydispersity of traditional PEG polymers. Monodisperse PEGs retain polyethylene glycol’s good solubility in water, offering to PEGylated drugs the same PEG benefits of reduced aggregation and immunogenicity, and increased hydrodynamic volume.

JenKem Technology provides GMP grade discrete PEG derivatives and bulk orders via custom synthesis, offering the opportunity to match customers’ special quality requirements. JenKem Technology is capable of development and synthesis of a wide range of GMP monodisperse PEG derivatives starting at 200g up to 15 kg or greater batches, under ISO 9001 and ISO 13485 certified quality management system, following ICH Q7A guidelines.

Please click the buttons below to order directly from JenKem Technology. Monodisperse PEG products with molecular weights and functional groups not listed in our online catalog may be available by custom synthesis. For inquiries on custom production of monodisperse PEG derivatives and PEGylation services please contact us at For global distributor information, please visit link.

Many products are available at higher purity (>98%, >99%) with <1% highest single impurity, please click this link for a selection of in-stock high purity monodisperse PEGs.

Various > 98%
252.2 ≥ 95%
296.2 ≥95%
251.4 ≥95%
295.3 ≥95%
324.4 ≥95%
368.2 ≥95%
277.3 ≥90%
321.4 ≥90%
268.4 ≥90%
312.4 ≥90%
306.3 ≥90%
350.4 ≥90%
370.5 ≥95%
414.5 ≥95%
546.7 ≥95%
368.5 ≥95%
544.8 ≥95%
486.5 ≥95%
662.7 ≥95%
514.6 ≥95%
674.8 ≥95%
369.5 ≥95%
545.8 ≥95%
428.5 ≥95%
604.8 ≥95%
442.5 ≥95%
618.8 ≥95%


1. El-Gogary, R.I., et al., Polyethylene Glycol Conjugated Polymeric Nanocapsules for Targeted Delivery of Quercetin to Folate-Expressing Cancer Cells in Vitro and in Vivo. ACS Nano, 2014, 8(2): p. 1384-1401.

2. Zhou, J., et al., In vivo evaluation of medical device-associated inflammation using a macrophage-specific positron emission tomography (PET) imaging probe. Bioorganic & Medicinal Chemistry Letters, 2013, 23(7): p. 2044-2047.

3. Hutanu D, et al.,  Recent Applications of Polyethylene Glycols (PEGs) and PEG Derivatives. Mod Chem appl, 2014, 2:132. Read about select applications of JenKem® PEGs in the medical device, drug development, and diagnostics areas, including drug delivery, wound healing, cell culture models, and tissue regeneration.

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.