C5O3OH2

Croconic Cro*con"ic (kr?-k?n"?k), a. [Gr. ???? saffron.] 1. Of, pertaining to, or resembling saffron; having the color of saffron; as, croconic acid. [1913 Webster]

2. Pertaining to, or derived from, croconic acid. [1913 Webster]

{Croconic acid} (Chem.), a yellow crystalline substance, {C5O3(OH)2}, obtained from potassium carboxide, rhodizonic acid, and various phenol and quinone derivatives of benzene, and forming yellow or orange colored salts. [1913 Webster]