Maleimide PEG (MAL PEG) is a polyethylene glycol derivative with a reactive maleimide group that selectively conjugates with thiol-containing molecules such as cysteine residues in proteins or thiol-modified ligands. This stable covalent linkage makes MAL PEG ideal for site-specific bioconjugation, protein labeling, and nanoparticle surface modification.

With excellent hydrophilicity and biocompatibility, Maleimide PEG is widely used in drug delivery systems, antibody–drug conjugates (ADCs), biosensors, and medical device coatings to enhance solubility, stability, and bioavailability.

We provide MAL PEGs from gram to 100 kg GMP-grade supply with high purity, lot-to-lot consistency, and complete analytical support—meeting the needs of both R&D and large-scale production.

Catalog No.	Name	Structure	M.W.	Purity	Buy
MF001022	mPEG-Mal			≥95%	Price
LP096022	DSPE-PEG-Mal			≥95%	Price
LP099022	DLPE-PEG-Mal			≥95%	Price
LP097022	DMPE-PEG-Mal			≥95%	Price
LP100022	DOPE-PEG-Mal			≥95%	Price
LP098022	DPPE-PEG-Mal			≥95%	Price
HE022002	Mal-PEG-OH			≥95%	Price
HE022050	Mal-PEG-NH2.HCl			≥95%	Price
HO022022	Mal-PEG-Mal			≥95%	Price
HE022005	Mal-PEG-NH2			≥95%	Price
HE022123	Mal-NH-PEG-NH2.TFA			≥95%	Price
HE022061	Mal-NH-PEG-PCL(10K)			≥95%	Price
HE022059	Mal-NH-PEG-PCL(2K)			≥95%	Price
HE022060	Mal-PEG-PCL(3K)			≥95%	Price
HE022063	MAL-PEG-PLA(2K)			≥95%	Price
HE022265	Mal-PEG-PLA(8K)			≥95%	Price
HE022184	Mal-NH-PEG-PLA(10K)			≥95%	Price
HE022180	Mal-NH-PEG-PLGA(20K)			≥95%	Price
HE022025	Mal-NH-PEG-SPA			≥95%	Price
HE022203	Mal-PEG-CLA			≥95%	Price
HE022017	Mal-PEG-COOH			≥95%	Price
HE022019	Mal-PEG-HZ			≥95%	Price
HE022213	Mal-PEG-MTA			≥95%	Price
HE022210	Mal-PEG-Niacin			≥95%	Price
HE022211	Mal-PEG-OLA			≥95%	Price
HE022113	Mal-PEG-PFP			≥95%	Price
HE022216	Mal-PEG-Progestrone			≥95%	Price
HE022223	Mal-PEG-PS			≥95%	Price
HE022023	Mal-PEG-SC			≥95%	Price
HE022024	Mal-PEG-SCM			≥95%	Price
HE022027	Mal-PEG-SG			≥95%	Price
HE022028	Mal-PEG-SS			≥95%	Price
HE022058	Mal-PEG-SVA			≥95%	Price
HE022166	Mal-PEG-Tretinoin			≥95%	Price
HE010022	ACA-PEG-NH-Mal			≥95%	Price
HE194022	Acetylthio-PEG-Mal			≥95%	Price
HE009022	AC-PEG-Mal			≥95%	Price
HE007022	AlKyne-PEG-Mal			≥95%	Price
HE041022	Biotin-PEG-Mal			≥95%	Price
HE068022	Boc-NH-PEG-Mal			≥95%	Price
HE056022	Br-PEG-Mal			≥95%	Price
HE004022	CHO-PEG-Mal			≥95%	Price
LP095022	CLS-PEG-Mal			≥95%	Price
HE053022	COCl-PEG-NH-Mal			≥95%	Price
FL077022	Cy3.5-PEG-Mal			≥95%	Price
FL167022	Cy3-PEG-Mal			≥95%	Price
FL078022	Cy5-PEG-Mal			≥95%	Price
HE048022	DBCO-PEG-Mal			≥95%	Price
FL044022	FITC-PEG-Mal			≥95%	Price
HE069022	Fmoc-NH-PEG-Mal			≥95%	Price
HE051022	DF-PEG-Mal			≥95%	Price
HE222022	Diethoxylsilane-PEG-Mal			≥95%	Price
HE022208	Estrogen-PEG-Mal			≥95%	Price
HE057022	FA-PEG-Mal				Price
HE297022	Glucose-PEG-NH-MAL			≥95%	Price
HE018022	IA-PEG-Mal			≥95%	Price
HE039022	LA-PEG-Mal			≥95%	Price
HE011022	MA-PEG-Mal			≥95%	Price
HE035022	OPSS-PEG-Mal			≥95%	Price
LP226022	Palmitic acid-PEG-Mal			≥95%	Price
HE062022	PCL(12K)-PEG-Mal			≥95%	Price
HE116022	PCL(5K)-PEG-Mal			≥95%	Price
HE087022	PLGA(10K)-PEG-Mal			≥95%	Price
HE088022	PLGA(12K)-PEG-Mal			≥95%	Price
HE089022	PLGA(15K)-PEG-Mal			≥95%	Price
HE118022	PLGA(18K)-PEG-Mal			≥95%	Price
HE086022	PLGA(50:50)(8K)-PEG-Mal			≥95%	Price
HE085022	PLGA(5K)-PEG-Mal			≥95%	Price
FL045022	RB-PEG-Mal			≥95%	Price
HE020022	Silane-PEG-Mal			≥95%	Price
LP101022	STA-PEG-Mal			≥95%	Price
HE161022	Tocopherol-PEG-Mal			≥95%	Price
HE090022	VD-PEG-Mal			≥95%	Price
HE199022	LNA-PEG-Mal			≥95%	Price
HE198022	LRA-PEG-Mal			≥95%	Price
HE207022	MTX-PEG-Mal			≥95%	Price
HE255022	N+Me3-PEG-NH-Mal			≥95%	Price
HE185022	PLGA(30K)-PEG-NH-Mal			≥95%	Price
HE262022	c(RGDyK)-PEG-NH-Mal			≥95%	Price