The molecule is a monovalent inorganic anion obtained by deprotonation of one of the two OH groups in dichromic acid. It is a chromium oxoanion and a monovalent inorganic anion. It is a conjugate base of a dichromic acid. It is a conjugate acid of a dichromate(2-).
hydroxy-(oxido(dioxo)chromio)oxy-dioxochromium