What Color Does Boric Acid Burn?

Boric acid imparts a pale green color to a flame.

Boric acid is one of the few min­er­al acids which is ca­pa­ble of form­ing com­plex es­ters. Es­ters of boric acid burn with a green flame, and this prop­er­ty is used in an­a­lyt­i­cal chem­istry for de­tect­ing boric acid and its salts. Pure es­ters of boric acid burn at a tem­per­a­ture of around 30 °С, so you can safe­ly put your hand in the flame.

A very pale green color is imparted to the flame by boron in boric acid. Because, Boric Acid is a boron containing compound Any boron-containing compound will cause flames to emit a green colour. When boron compounds are heated, electrons absorb a certain amount of heat energy that causes them to jump to higher energy levels.