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**Molecular formula:** H₃BO₃
**Molar mass:** 61,832 g/mol
**Information:** Boric acid is a white crystalline solid. It forms white flaky crystals, in which
planar molecules of boric acid are connected into layers of hydrogen bonds. It behaves as a very weak acid.
**Use:** Its 2% to 3 % aqueous solution (boric acid) is used in ophthalmology. It is also used in pyrotechnics (green flame colour).