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PEG azide or Azido PEG is widely used in
a) Click Chemistry, the particular example of the Cu(I) catalyzed reaction of the azide and a terminal acetylene; and
b) the Staudinger ligation using functionalized aryl phosphines to couple the azide in a covalent fashion to form amides. The attraction of the azide functionality is its high selectivity and stability under most conditions, especially where other conjugating functionalities have to be used due to their limited stability, or when careful control of variables, like pH, are required in order to insure high yielding reactions.

Azide PEG
Catalog# Name Structure M.W. Purity Pricing
3-(Azido-PEG-amino)propanol
AP112363-(Azido-PEG5-amino)propanol364.44≥95% Pricing
Aminooxy-PEG-azide
AP12036Aminooxy-PEG1-azide146.15≥95% Pricing
AP12037Aminooxy-PEG2-azide190.2≥95% Pricing
AP12038Aminooxy-PEG3-azide234.26≥95% Pricing
AP12039Aminooxy-PEG4-azide278.31≥95% Pricing
AP12040Aminooxy-PEG5-azide322.36≥95% Pricing
APN-PEG-azide
AP11573APN-C3-PEG4-azide500.56≥95% Pricing
Azide-PEG-Ms
AP11572Azide-PEG2-Ms209.22≥95% Pricing
Azido-PEG-(CH2)3-methyl ester
AP11587Azido-PEG4-(CH2)3-methyl ester319.36≥95% Pricing
Azido-PEG-(CH2)3OH
AP11234Azido-PEG3-(CH2)3OH233.27≥95% Pricing
AP11235Azido-PEG4-(CH2)3OH277.32≥95% Pricing
Azido-PEG-acid
AP11642Azido-PEG1-acid159.15≥95% Pricing
AP11643Azido-PEG2-acid203.2≥95% Pricing
AP10247Azido-PEG3-acid247.25≥95% Pricing
AP10248Azido-PEG4-acid291.3≥95% Pricing
AP10249Azido-PEG5-acid335.35≥95% Pricing
AP10250Azido-PEG6-acid379.41≥95% Pricing
AP10251Azido-PEG8-acid467.51≥95% Pricing
AP10252Azido-PEG9-acid511.56≥95% Pricing
AP116452-((Azido-PEG8-carbamoyl)methoxy)acetic acid554.59≥95% Pricing
AP10253Azido-PEG10-acid555.61≥95% Pricing
AP10254Azido-PEG11-acid599.67≥95% Pricing
AP10255Azido-PEG12-acid643.72≥95% Pricing
AP10256Azido-PEG16-acid819.93≥95% Pricing
AP10257Azido-PEG24-acid1172.35≥95% Pricing