JenKemBeijingRnDJenKem Technology provides high quality activated homobifunctional polyethylene glycol derivatives (PEGs) with high purity and low polydispersity.

JenKem Technology’s homobifunctional PEG derivatives have numerous applications as cross-linkers, including PEGylation of proteins and peptides, or nanoparticle and surface modifications [1, 2]. Homobifunctional PEG derivatives have the general structure: X―PEG―X, where X is a functional reactive group.

Homobifunctional PEG products with molecular weights and functional groups not listed in our online catalog may be available by custom synthesis. Please inquire at about pricing and availability of custom homofunctional PEGs.

JenKem Technology provides GMP grade 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 PEG derivatives starting at 200g up to 40 kg or greater batches, under ISO 9001 and ISO 13485 certified quality management system, following ICH Q7A guidelines. For inquiries on cGMP production of PEG derivatives and PEGylation services please contact us at

For global distribution, please visit link. Please click the buttons below to order directly from JenKem Technology:

≥ 95% PEG (Acetic Acid)2 (PEG dicarboxyl, PEG diacetic acid, CM-PEG-CM, COOH-PEG-COOH, Carboxyl PEG Carboxyl) Amino reactive PEG crosslinker. [1-4]

≥ 95% Discrete PEG8 (Acetic Acid)2 and PEG12 (Acetic Acid)2  (Discrete PEG dicarboxyl, PEG diacetic acid, CM-PEG-CM, COOH-PEG-COOH)  Monodisperse discrete amino reactive PEG crosslinker [5].

≥ 95% Discrete PEG8 (Propionic Acid)2 and PEG12 (Propionic acid)2 (Monodisperse discrete PEG8 and PEG 12 dipropionic acid, PA-PEG PA, PEG dipropanoic acid). Monodisperse discrete amino reactive PEG crosslinker.
≥ 95% SCM PEG SCM (PEG diNHS, PEG diSuccinimidyl Carboxymethyl Ester, SCM-PEG-SCM, NHS-PEG-NHS, or PEG diSCM).  Amino reactive PEG diNHS ester crosslinker for lysine(s) or N-terminal amine. [6-7]
> 90% SS PEG SS (PEG diSuccinimidyl Succinate Ester, SS-PEG-SS, or PEG diSS).  Amino reactive PEG diNHS ester crosslinker for lysine(s) or N-terminal amine, with cleavable linker.
≥ 95% Amine PEG Amine (PEG diamine, PEG (Amine)2). Crosslinker PEG, attaches via stable linkages, such as amide, urethane, urea, secondary amine. [8-19]

≥ 95% Discrete PEG8 (Amine)2 and PEG12 (Amine)2 (Monodisperse PEG diamine, PEG (Amine)2). Crosslinker PEG, attaches via stable linkages, such as amide, urethane, urea, secondary amine.
> 90% Maleimide PEG Maleimide (PEG dimaleimide, PEG(Maleimide)2). Selective crosslinker for thiol groups on cystein side chains. [20-24]
≥ 95% Acrylate-PEG-Acrylate (PEG-DA, PEG diacrylate, PEG (Acrylate)2). PEG crosslinker used in vinyl polymerization or co-polymerization. [25-30]
≥ 95% Thiol PEG Thiol (PEG dithiol, PEG(Thiol)2). Thiol reactive PEG crosslinker, reacts with HS groups on cysteine side chains under mild reaction conditions. [31-33]
> 90% Vinylsulfone PEG Vinylsulfone (PEG-divinylsulfone, PEG (Vinylsulfone)2). Sulfhydryl reactive PEG crosslinker.[34-37]
≥ 90% Tosylate PEG Tosylate (diTosylate PEG, PEG diToluenesulfonyl , or PEG (Tosylate)2). Reactive homobifunctional PEG crosslinker employed for amine and thiol PEGylation
> 90% Alkyne-PEG-Alkyne (diAcetylene PEG, di Propargyl PEG, PEG)Alkyne)2, or dialkyne PEG). Click PEG crosslinking reagent for reaction with azide groups

> ≥95% Discrete PEG8 Dihydroxyl, PEG9 Dihydroxyl and PEG12-Dihydroxyl (HO-PEG8-OH, HO-PEG9-OH and HO-PEG12-OH)Monodisperse dihydroxyl PEG, dialcohol PEG). Monodisperse polyethylene glycol raw material.

3ARM, 4ARM, 6ARM, and 8ARM Homofunctional PEGs

Linear, 3ARM, 4ARM, 6ARM, and 8ARM PEG Raw Materials (Hydroxyl PEGs)


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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.