(2-pyridyldithio)-PEG4-propargyl is a PEG Linker.

S-acetyl-PEG4-alcohol is a PEG Linker.

Methyltetrazine-PEG8-NHS ester is a PEG Linker.

Methyltetrazine-PEG8-acid is a PEG Linker

TCO-PEG4-biotin is a PEG Linker containing a TCO moeity.

Tos-PEG4-t-butyl ester is a PEG derivative containing a t-butyl ester and a tosyl group. The hydrophilic PEG spacer increases solubility in aqueous media. The t-butyl protected carboxyl group can be deprotected under acidic conditions. The tosyl group is a very good leaving group for nucleophilic substitution reactions.

N-Mal-N-bis(PEG4-NH-Boc) is a branched PEG derivative with a terminal maleimide group and two terminal Boc protected amino groups. The maleimide group will react with a thiol group to form a covalent bond, enabling the connection of biomolecule with a thiol. The protected amines can be deprotected by acidic conditions.

N-Mal-N-bis(PEG2-NH-Boc) is a branched PEG derivative with a terminal maleimide group and two terminal Boc protected amino groups. The maleimide group will react with a thiol group to form a covalent bond, enabling the connection of biomolecule with a thiol. The protected amines can be deprotected by acidic conditions.

N-Mal-N-bis(PEG2-NHS ester) is a branched PEG derivative with a terminal maleimide group and two terminal NHS esters. The maleimide group will react with a thiol group to form a covalent bond, enabling the connection of biomolecule with a thiol. The NHS esters can be used to label the primary amines (-NH2) of proteins, amine-modified oligonucleotides, and other amine-containing molecules.

N-Mal-N-bis(PEG4-amine) TFA salt is a branched PEG derivative with a terminal maleimide group and two terminal amino groups. The maleimide group will react with a thiol group to form a covalent bond, enabling the connection of biomolecule with a thiol. The amino group is reactive with carboxylic acids, activated NHS esters, carbonyls (ketone, aldehyde) etc.

N-Mal-N-bis(PEG2-amine) TFA salt is a branched PEG derivative with a terminal maleimide group and two terminal amino groups. The maleimide group will react with a thiol group to form a covalent bond, enabling the connection of biomolecule with a thiol. The amino group is reactive with carboxylic acids, activated NHS esters, carbonyls (ketone, aldehyde) etc.

Mal-amido-PEG9-amine TFA salt is a PEG derivative containing a maleimide group and an amine group. The hydrophilic PEG spacer increases solubility in aqueous media. The amine group is reactive with carboxylic acids, activated NHS esters, carbonyls (ketone, aldehyde) etc. The maleimide group will react with a thiol group to form a covalent bond, enabling the connection of biomolecule with a thiol.

Mal-amido-PEG9-NHBoc is a PEG derivative containing a maleimide group and a Boc protected amine group. The hydrophilic PEG spacer increases solubility in aqueous media. The protected amine can be deprotected by acidic conditions. The maleimide group will react with a thiol group to form a covalent bond, enabling the connection of biomolecule with a thiol.

N-(t-butyl ester-PEG3)-N-bis(PEG3-azide) is a branched PEG derivative with two terminal azide group and a t-butyl ester. The azide groups enable PEGylation via Click Chemistry. The t-butyl protected carboxyl group can be deprotected under mild acidic conditions.

N-(NHS-PEG3)-N-bis(PEG3-azide) is a branched PEG derivative with two terminal azide groups and a terminal NHS ester. The azide groups enable PEGylation via Click Chemistry. The NHS ester can be used to label the primary amines (-NH2) of proteins, amine-modified oligonucleotides, and other amine-containing molecules.

N-(Azido-PEG4)-N-bis(PEG4-NHS ester) is a branched PEG derivative with a terminal azide group and two terminal NHS esters. The azide group enables PEGylation via Click Chemistry. The NHS esters can be used to label the primary amines (-NH2) of proteins, amine-modified oligonucleotides, and other amine-containing molecules.

N-(acid-PEG3)-N-bis(PEG3-azide) is a branched PEG derivative with two terminal azide groups and a terminal carbozylic acid. The azide groups enables PEGylation via Click Chemistry. The terminal carboxylic acid can be reacted with primary amino groups in the presence of activators (e.g. EDC, or DCC) to form a stable amide bond.

N-(Azido-PEG3)-NH-PEG3-acid HCl salt is a branched PEG derivative with a terminal azide group and terminal caboxylic acid. The amino group is reactive with carboxylic acids, activated NHS esters, and carbonyls. The azide group enables PEGylation via Click Chemistry. The terminal carboxylic acid can be reacted with primary amino groups in the presence of activators (e.g. EDC, or DCC) to form a stable amide bond.

APN-C3-PEG4-azide is part of a new class of thiol-specific conjugation reagents consisting of a thiol-reactive 3-arylpropiolonitrile (APN) group. This molecule has good stability in aqueous media. The APN group allows the targeted coupling of thiols in biomolecules, and results in stable thioether linkages without the risk of subsequent side reactions that can occur with maleimides.

Azide-PEG5-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-PEG4-hydrazide HCl Salt is a PEG Linker.

Azido-PEG8-CH2CO2-PFP is a PEG Linker.

Azido-PEG5-CH2CO2-PFP is a PEG Linker.

Azido-PEG3-aminoacetic acid-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.

Azido-PEG8-CH2CO2-NHS 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.

Azido-PEG5-CH2CO2-NHS 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.

m-PEG10-Tos is a PEG derivative containing a tosyl group. The tosyl group is a very good leaving group for nucleophilic substitution reactions. The hydrophilic PEG spacer increases solubility in aqueous media.

m-PEG2-azide is a PEG derivative containing an azide group. The azide group can react with alkyne, BCN, DBCO via Click Chemistry to yield a stable triazole linkage. The hydrophilic PEG spacer increases solubility in aqueous media.

THP-PEG3 is a PEG derivative that may be useful in the development of antibody drug conjugates.

m-PEG6-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.