The following reagent converts C₆H₅COCHO to C₆H₅CHOHCOONa

${\mathrm{C}}_6{\mathrm{H}}_5-\stackrel{\stackrel{\mathrm{O}}{\parallel }}{\mathrm{C}}-\stackrel{\stackrel{\mathrm{O}}{\parallel }}{\mathrm{C}}-\mathrm{H} \stackrel{\mathrm{aq}.\mathrm{NaOH}}{\to }{\mathrm{C}}_6{\mathrm{H}}_5-\stackrel{\stackrel{\mathrm{OH}}{|}}{\mathrm{C}}\mathrm{H}-\mathrm{COOH}$

This is a Cannizzaro reaction processed in basic catalyzed medium.