PEG5-bis-(ethyl phosphonate) is a PEG Linker.

m-PEG4-succinimidyl carbonate is a PEG Linker.

Bis-Mal-Lysine-PEG4-TFP ester is a PEG Linker.

Bis-Mal-Lysine-PEG4-acid is a PEG Linker.

Mal-amido-PEG2-TFP ester is a PEG Linker.

Mal-PEG4-alcohol is a PEG derivative containing a maleimide group and a hydroxyl group. The hydrophilic PEG spacer increases solubility in aqueous media. The hydroxyl group enables further derivatization or replacement with other reactive functional groups. The maleimide group will react with a thiol group to form a covalent bond, enabling the connection of biomolecule with a thiol.

Mal-PEG3-alcohol is a PEG derivative containing a maleimide group and a hydroxyl group. The hydrophilic PEG spacer increases solubility in aqueous media. The hydroxyl group enables further derivatization or replacement with other reactive functional groups. The maleimide group will react with a thiol group to form a covalent bond, enabling the connection of biomolecule with a thiol.

Mal-Amido-PEG4-t-butyl ester is a PEG derivative containing a maleimide group and a t-butyl ester group. The hydrophilic PEG spacer increases solubility in aqueous media. The t-butyl protected carboxyl group can be deprotected under acidic conditions. The maleimide group will react with a thiol group to form a covalent bond, enabling the connection of biomolecule with a thiol.

Mal-PEG4-PFP is a PEG Linker.

Mal-PEG2-NHS ester is a PEG derivative containing a maleimide group and an NHS ester group. The hydrophilic PEG spacer increases solubility in aqueous media. The NHS ester can be used to label the primary amines (-NH2) of proteins, amine-modified oligonucleotides, and other amine-containing molecules. The maleimide group will react with a thiol group to form a covalent bond, enabling the connection of biomolecule with a thiol.

Azido-PEG4-Amido-tri-(t-butoxycarbonylethoxymethyl)-methane is a branched PEG derivative with a terminal azide group and three t-butyl esters. The azide group enables PEGylation via Click Chemistry. The t-butyl protected carboxyl groups can be deprotected under mild acidic conditions.

Azido-PEG4-4-nitrophenyl carbonate is a PEG derivative containing an azide group and an reactive nitrophenyl carbonate(NPC group). The NPC group is reactive towards the amino group of lysine by means of stable urethane linkages. The azide group enables Click Chemistry. The hydrophilic PEG spacer increases solubility in aqueous media.

Azide-PEG7-Tos is a PEG derivative containing an azide group and a tosyl group. The hydrophilic PEG spacer increases solubility in aqueous media. The azide group can react with alkyne, BCN, DBCO via Click Chemistry to yield a stable triazole linkage. The tosyl group is a good leaving group for nucleophilic substitution reactions.

Azido-PEG5-CH2CO2-t-Bu is a PEG derivative containing an azide group and a t-butyl ester. The hydrophilic PEG spacer increases solubility in aqueous media. The azide group can react with alkyne, BCN, DBCO via Click Chemistry to yield a stable triazole linkage. The t-butyl protected carboxyl group can be deprotected under acidic conditions.

Azide-PEG5-t-butyl ester is a PEG derivative containing an azide group and a t-butyl ester. The hydrophilic PEG spacer increases solubility in aqueous media. The azide group can react with alkyne, BCN, DBCO via Click Chemistry to yield a stable triazole linkage. The t-butyl protected carboxyl group can be deprotected under acidic conditions.

Azido-PEG5-succinimidyl carbonate is a PEG Linker.

Azido-PEG1-CH2CO2-NHS is a PEG Linker.

Azido-PEG5-NHS ester is a PEG derivative containing an azide group and an NHS ester. The hydrophilic PEG spacer increases solubility in aqueous media. The azide group can react with alkyne, BCN, DBCO via Click Chemistry to yield a stable triazole linkage. The NHS ester can be used to label the primary amines (-NH2) of proteins, amine-modified oligonucleotides, and other amine-containing molecules.

Ald-CH2-PEG5-azide is a crosslinker containing an azide group and an aldehyde group. The azide group enables PEGylation via Click Chemistry. The aldehyde group reacts with amines and the N-terminal of peptides and proteins to form an imine containing a C=N double bond, which can be further reduced. PEG aldehyde or ketone derivatives can be used in reversible PEGylation through its reaction with hydrazine or hydrazide forming a hydrolytic acyl hydrozone linkage.

Ald-Ph-PEG3-amine TFA salt is a PEG Linker

Ald-CH2-PEG5-t-butyl ester is a PEG Linker.

Ald-CH2-PEG4-t-butyl ester is a PEG Linker.

m-PEG4-hydrazide is a PEG Linker.

m-PEG6-NHS ester is a PEG derivative containing an NHS ester. The NHS ester can be used to label the primary amines (-NH2) of proteins, amine-modified oligonucleotides, and other amine-containing molecules. The hydrophilic PEG spacer increases solubility in aqueous media.

m-PEG2-acid is a PEG derivative containing a terminal carboxylic acid. The terminal carboxylic acid can be reacted with primary amine groups in the presence of activators (e.g. EDC, or DCC) to form a stable amide bond. The hydrophilic PEG spacer increases solubility in aqueous media.

Hydroxy-Amino-bis(PEG1-t-butyl ester) is a branched PEG derivative with a terminal hydroxy group and two t-butyl esters. The hydroxy group enables further derivatization or replacement with other reactive functional groups. The t-butyl protected carboxyl groups can be deprotected under mild acidic conditions.

Azido-PEG4-Amido-Tris, also known as Azido-PEG4-Amido-tri-(carboxyethoxymethyl)-methane, is a multi-arm PEG containing an azide group and three hydroxyl groups. The azide group enables Click Chemistry. The indicated molecular weight of the multi-arm PEG is the sum of the molecular weights of all the arms. The hydroxyl group enables further derivatization or replacement with other reactive functional groups.

THP-PEG6 is a PEG derivative. PEG derivatives may be useful in the development of antibody drug conjugates.

m-PEG4-(CH2)3-alcohol is a PEG derivative containing a hydroxyl group. The hydroxyl group enables further derivatization or replacement with other reactive functional groups. The hydrophilic PEG spacer increases solubility in aqueous media.

Hydroxy-PEG2-CH2CO2tBu is a PEG derivative containing a hydroxyl group with a t-butyl protected carboxyl group. The hydrophilic PEG spacer increases solubility in aqueous media. The hydroxyl group enables further derivatization or replacement with other reactive functional groups. The t-butyl protected carboxyl group can be deprotected under acidic conditions.