Azido-PEG2-PFP ester is a PEG derivative containing an azide group and a PFP group. The azide group enables Click Chemistry. The PFP ester is a better leaving group compared to a hydroxyl group and can be used to label the primary amines (-NH2) of proteins, amine-modified oligonucleotides, and other amine-containing molecules. The hydrophilic PEG spacer adds to the water solubility of this reagent.

Azido-PEG8-CH2CO2H 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.

Ald-Ph-PEG4-NHS ester is a PEG Linker.

Cbz-N-amido-PEG8-acid is a PEG derivative containing a CBZ-protected amino group and 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. The protected amine can be deprotected by acidic conditions.

Cbz-N-amido-PEG6-acid is a PEG derivative containing a CBZ-protected amino group and 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. The protected amine can be deprotected by acidic conditions.

Cbz-N-amido-PEG5-acid is a PEG derivative containing a CBZ-protected amino group and 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. The protected amine can be deprotected by acidic conditions.

Cbz-N-amido-PEG2-acid is a PEG derivative containing a CBZ-protected amino group and 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. The protected amine can be deprotected by acidic conditions.

Azido-PEG1-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.

6-Bromohexylphosphonic acid is a non-PEG Crosslinker.

Methylamino-PEG3-azide is a PEG derivative containing an azide group with a methylamine 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 methylamine group is reactive with carboxylic acids, carbonyls (ketone, aldehyde) etc.

Methylamino-PEG1-acid HCl salt is a PEG derivative containing a carboxylic acid with a methylamine group. The hydrophilic PEG spacer increases solubility in aqueous media. The methylamine group is reactive with carboxylic acids, carbonyls (ketone, aldehyde) etc. 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.

NHS-PEG4-(m-PEG4)3-ester is a branched PEG derivative with a terminal NHS ester. The NHS ester can be used to label the primary amines (-NH2) of proteins, amine-modified oligonucleotides, and other amine-containing molecules.

m-PEG8-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.

m-PEG6-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.

2-(Azido-PEG2-amido)-1,3-propandiol is a multi-arm PEG with azide or hydroxyl at the terminal of all arms. The azide group enables Click Chemistry. The hydroxyl group enables further derivatization or replacement with other reactive functional groups.

TBDMS-PEG5 is a PEG derivative which may be useful in the development of antibody drug conjugates.

Azido-PEG2-alcohol is a PEG derivative containing an azide group and a terminal hydroxyl 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 hydroxyl group enables further derivatization or replacement with other reactive functional groups.

Hydroxy-PEG8-t-butyl ester is a PEG derivative containing a hydroxyl group with a t-butyl ester. 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.

Hydroxy-PEG6-acid is a PEG derivative containing a hydroxyl group with 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. The hydroxyl group enables further derivatization or replacement with other reactive functional groups.

Hydroxy-PEG2-acid is a PEG derivative containing a hydroxyl group with 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. The hydroxyl group enables further derivatization or replacement with other reactive functional groups.

Fmoc-PEG8-NHS ester is a PEG derivative containing an Fmoc-protected amine and an NHS ester. 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 NHS ester can be used to label the primary amines (-NH2) of proteins, amine-modified oligonucleotides, and other amine-containing molecules.

Fmoc-PEG3-NHS ester is a PEG derivative containing an Fmoc-protected amine and an NHS ester. The Fmoc group can be deprotected under basic condition to obtain the free amine which can be used for further conjugations. The NHS ester can be used to label the primary amines (-NH2) of proteins, amine-modified oligonucleotides, and other amine-containing molecules.

Fmoc-NH-PEG3-CH2COOH 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 condition 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.

DNP-PEG3-DNP is a PEG Linker

DNP-PEG2-acid is a PEG Linker. PEG Linkers may be useful in the development of antibody drug conjugates.

DBCO-NHCO-PEG5-NHS ester is a PEG derivative containing NHS ester that is able to react specifically and efficiently with primary amines such as the side chain of lysine residues or aminosilane-coated surfaces at neutral or slightly basic condition to form a covalent bond. The hydrophilic PEG spacer arm improves water solubility and can also provide a long and flexible connection that minimizes steric hindrance during ligation.

Propargyl-PEG1-SS-alcohol is a cleavable PEG Linker. PEG Linkers may be useful in the development of antibody drug conjugates.

Chloroacetamido-PEG4-t-Butyl Ester is a PEG Linker. PEG Linkers may be useful in the development of antibody drug conjugates.

Chloroacetamido-PEG4-NHS ester is a PEG derivative. PEG Linkers and derivatives may be useful in the development of antibody drug conjugates.

Bromoacetamido-PEG2-NHS ester is a PEG derivative containing a bromide group and an NHS ester. The bromide (Br) is a very good leaving group for nucleophilic substitution reactions. The NHS ester can be used to label the primary amines (-NH2) of proteins, amine-modified oligonucleotides, and other amine-containing molecules.