Azido-PEG4-beta-D-glucose is a PEG derivative containing one azide group and one D-glucose group. The azide group enables Click Chemistry. The hydrophilic PEG spacer increases solubility in aqueous media. D-glucose increases solubility in aqueous media and increases the selectivity of the PEGylation reaction.

Tos-PEG4-CH2CO2H is a PEG derivative containing a tosyl group and a terminal carboxylic acid. The hydrophilic PEG spacer increases solubility in aqueous media. The tosyl group is a very good leaving group for nucleophilic substitution reactions. 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.

Tos-PEG7-CH2CO2tBu 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.

Tos-PEG5-CH2CO2tBu 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.

Tos-PEG2-CH2CO2tBu 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.

Propargyl-PEG3-phosphonic acid is a crosslinker containing a propargyl group and a phosphonic acid. The propargyl group can be reacted with azide-bearing compounds or biomolecules via copper catalyzed azide-alkyne Click Chemistry to yield a stable triazole linkage. The hydrophilic PEG spacer increases solubility in aqueous media.

t-butyoxycarboxy-PEG4-phosphonic acid ethyl ester is a PEG Linker.

Carboxy-PEG4-phosphonic acid is a PEG Linker.

PEG3-bis-(ethyl phosphonate) is a PEG Linker.

Mal-PEG6-PFP is a PEG Linker.

Mal-PEG6-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.

Mal-PEG3-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.

Azide-PEG4-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-PEG8-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.

m-PEG4-benzaldehyde is a PEG Linker. PEG Linkers and derivatives may be useful in the development of antibody drug conjugates.

Azido-PEG10-acid is a PEG derivative containing an azide group with a terminal carboxylic acid. 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 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.

4-amino-N-(4-(2-cyanoethynyl)phenyl)butanamide is part of a new class of thiol-specific conjugation reagents consisting of a thiol-reactive 3-arylpropiolonitrile (APN) group. 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.

tert-butyl 3-(4-(2-cyanoethynyl)phenylcarbamoyl)propylcarbamate is part of a new class of thiol-specific conjugation reagents consisting of a thiol-reactive 3-arylpropiolonitrile (APN) group. 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.

Methylamino-PEG4-t-butyl ester is a PEG derivative containing a methylamine group and a t-butyl ester. The hydrophilic PEG spacer increases solubility in aqueous media. The methylamine group is reactive with carboxylic acids, carbonyls (ketone, aldehyde) etc. The t-butyl protected carboxyl group can be deprotected under acidic conditions.

m-PEG7-Tos is a PEG derivative containing a tosyl group. The hydrophilic PEG spacer increases solubility in aqueous media. The tosyl group is a very good leaving group for nucleophilic substitution reactions.

m-PEG6-Mal is a PEG derivative containing a maleimide group. The maleimide group will react with a thiol group to form a covalent bond, enabling the connection of biomolecule with a thiol. The hydrophilic PEG spacer increases solubility in aqueous media.

N-Benzyl-N-bis(PEG3-OH) is a PEG Linker

Hydroxy-PEG3-acrylate is a PEG Linker. PEG Linkers may be useful in the development of antibody drug conjugates.

PEG6-Tos is a PEG derivative containing a hydroxyl group with a tosyl group. The hydrophilic PEG spacer increases solubility in aqueous media. The hydroxyl group enables further derivatization or replacement with other reactive functional groups. The tosyl group is a very good leaving group for nucleophilic substitution reactions.

Hydroxy-PEG4-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.

Fmoc-N-amido-PEG1-acid is a PEG derivative containing an Fmoc-protected amine and a terminal carboxylic acid. The hydrophilic PEG spacer increases solubility in aqueous media. The Fmoc group can be deprotected under basic conditions to obtain the free amine which can be used for further conjugations. 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.

Carboxyrhodamine 110-PEG3-Azide is a green-fluorescent label with excitation/emission maximum 501/523 nm. This molecule contains an azide group which enables Click Chemistry.

Aminoethyl-SS-propionic acid is a cleavable PEG Linker. PEG Linkers may be useful in the development of antibody drug conjguates.

Aminoethyl-SS-ethylalcohol is a cleavable PEG Linker. PEG Linkers may be useful in the development of antibody drug conjugates.

Bromoacetamido-PEG8-acid is a PEG derivative containing a bromide group and a terminal carboxylic acid. The hydrophilic PEG spacer increases solubility in aqueous media. The bromide (Br) is a very good leaving group for nucleophilic substitution reactions. 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.