<page_title> Isotopes of cobalt </page_title> <section_title> List of isotopes </section_title> <table> <cell> 58Co <col_header> nuclide symbol </col_header> <col_header> excitation energy </col_header> </cell> <cell> 70.86(6) d <col_header> half-life </col_header> </cell> </table>
⁵⁸Co had a half-life of 70.86 days.