Physical Properties of Diazonium Salts

Benzenediazonium chloride is a colourless, crystalline solid. It is readily soluble in water and stable in COLD water, but reacts with WARM water (hydrolysing to phenol, as covered under its replacement reactions). Its aqueous solution is neutral to litmus and conducts electricity, since it is fully ionic in solution. Benzenediazonium TETRAFLUOROBORATE, by contrast, is soluble in water and notably stable even at room temperature -- which is why it is often the preferred, isolable form used in reaction …