About JenKem Technology

Founded in 2004, JenKem Technology specializes exclusively in the development and manufacturing of high quality polyethylene glycol polymers, derivatives, related block copolymers (such as PEG-PLGA, PEG-PLA, PEG-PCL), custom PEG synthesis and PEGylation services. JenKem Technology caters to the PEG needs of the pharmaceutical, biotechnology, medical device, diagnostics, and chemical specialty markets, from laboratory scale through GMP commercial scale.

JenKem Technology is a private company that has its headquarters in Beijing, China, its primary R&D, production, scale-up, and GMP manufacturing in Tianjin, China, and its raw PEG polymerization plant in Panjin, China. JenKem Technology USA, the international sales office of JenKem Technology, handles the sales of JenKem® PEGs and PEGylation services to all customers located outside mainland China.



Controlled manufacturing of polyethylene glycol (PEG) polymers with targeted molecular weights and functionality via the polymerization of ethylene oxide in 5kg, 15kg, 20kg, and 100kg batches, as needed, with annual capacity of over 10 metric tons of high quality raw PEGs and m-PEGs, with a new plant that has come on stream in 2017 which also has the capability of the purification of these raw PEGs under GMP conditions if needed for even higher quality products.

Development and manufacture of a wide range of PEG derivatives with high purity and low polydispersity, currently in 1 gram to 40 kg or greater sized batches, under ISO 9001 and ISO 13485 certified Quality Management Systems, following ICH Q7A guidelines and operating under cGMP protocols for regulated customers.

Custom synthesis of Y-Shaped PEGs, Methoxy PEGs, Homobifunctional PEGs, Heterobifunctional PEGs, Multi-arm PEGs, Multi-arm Heterobifunctional PEGs, Monodisperse (Discrete) PEGs, Biodegradable PEG Co-Polymers (such as PEG-PLGA, PEG-PLA, PEG-PCL, and other block polymers), and PEG GPC Standards.

Custom PEGylation of proteins, peptides, oligonucleotides, and small molecules; and conjugation of PEGs to other polymer systems. Large scale manufacturing on a custom synthesis basis, which offers the flexibility to match a customer’s specifications.

Global distribution of JenKem® PEG products direct from China and many research grade PEG derivatives sold through a collaboration with MilliporeSigma, link., listed in their catalog and on their website and identified as being a product of JenKem Technology. Online ordering of catalog PEG products, and custom synthesis services via request at sales@jenkemusa.com.

JenKem Technology’s Tianjin GMP PEG Production Facility 


The West Tianjin PEG production facility of JenKem Technology is located in the established Tianjin Economic-Technological Development Area (TEDA):

  • A thriving area with globally recognized companies
  • Neighbors include: GSK, Novo Nordisk, Wuxi, and Novozymes

JenKem Technology’s Beijing R&D PEGylation Site and Headquarters

  • Located in New Northwest Territories Development Zone
  • Part of Zhongguancun Science Park
  • Surrounded by numerous international companies

JenKem Technology’s Panjin PEG Raw Material Manufacture Site

  • Located in the Liaoning province
  • Convenient access to ethylene oxide raw material for PEG production
  • New plant came on stream in 2017

Intellectual Property

  • JenKem Technology has patented several PEG product lines
  • JenKem Technology helps customers file DMFs with the US FDA and has the capability to file for patents worldwide to protect your interests

We warmly invite our customers to audit our facilities!