It exists as a colourless solid that is soluble in polar solvents.

It is the parent member of the aryldiazonium compounds,[1] which are widely used in organic chemistry.

A wide range of groups that can be used to replace N2 including halide, SH−, CO2H−, OH−.

Of considerable practical value in the dye industry are the diazo coupling reactions.

[4] Whereas the chloride salt is explosive,[5] the tetrafluoroborate is readily isolated.