Composition of biphenanthrene skeleton-containing dihydroxy compound and producing method thereof

Abstract

The purpose of the present invention is to provide a composition containing a biphenanthrene skeleton-containing dihydroxy compound that can reduce problems caused by large amounts of metal remaining in conventional biphenanthrene skeleton-containing dihydroxy compounds. To achieve the above object, the present invention provides a composition containing a biphenanthrene skeleton-containing dihydroxy compound represented by the general formula (1a), in which the total content of sodium, potassium, iron, and copper is