金精（C.I. 43800），又称玫红酸，一种有机化合物。

金精由草酸、苯酚在浓硫酸条件下加热制备而成，反应如下所示。

Aurin (C.I. 43800), sometimes named rosolic acid or corallin is an organic compound, forming yellowish or deep-red crystals with greenish metallic luster. It is practically insoluble in water, freely soluble in alcohol. It is soluble in strong acids to form yellow solution, or in aqueous alkalis to form carmine red solutions.