Quinhydrone

C₁₂H₁₀O₄ = 218.2 (106-34-3)

Equimolecular compound of 1,4-benzoquinone and hydroquinone.

Dark green, lustrous crystals or a crystalline powder, slightly soluble in water, sparingly soluble in hot water, soluble in ethanol (96%) and in concentrated ammonia.

Melting point, about 170°.