The deficiency of thyroxine causes a disease called goiter, which is characterized by the enlargement of the thyroid gland in the neck.

Haloalkanes have halogen atoms attached to the sp³ hybridized carbon atom of an alkyl group, while haloarenes have halogen atoms attached to sp² hybridized carbon atom(s) of an aryl group.

Chloramphenicol is a chlorine-containing antibiotic produced by microorganisms and is effective for the treatment of typhoid fever.

Chelate therapy is used to treat problems caused by toxic metal proportions in biological systems. D-penicillamine and desferrioxime B remove excess copper and iron, respectively, through the formation of coordination compounds. EDTA is employed in treating lead poisoning.

Complexes [Ag(CN)₂]⁻ and [Au(CN)₂]⁻ enable smoother and more even electroplating of silver and gold than simple metal ions. In black and white photography, the developed film is fixed by washing with hypo solution, forming the complex ion [Ag(S₂O₃)₂]³⁻ that dissolves ...