can't read?
2-Azidoacetic acid undergoes Huisgen 1,3-dipolar cycloaddition with suitable dipolarophiles.
A 0112 2-Azidoacetic acid, 97% (otto) Cas 18523-48-3 - used to synthesize active precursors for azide-alkyne click reactions, which are commonly used in applications such as sensors, chemical labels and for protein ligation.