🔬 Discovery

Hypochlorous acid

Ácido hipocloroso

Date
1834 · confidence high
Place
Montpellier, Occitanie, France
Credited to
Antoine-Jérôme Balard
Field
Matter & energy

What was discovered

Balard prepared and named hypochlorous acid by reacting chlorine gas with an aqueous suspension of mercury(II) oxide. The compound gave rise to the hypochlorite family, the basis of disinfectants and household and industrial bleaches.

The exact city where Balard did the work is not precisely confirmed; in 1834 he was a professor in Montpellier.

What it led to

  • Hypochlorite-based disinfectants and bleaches
  • Water treatment with chlorine

Built on

  • Isolation of chlorine gas

Links

Sources✓ verified 2026-09-28