Malachite green metabolized into LMG. Only the cation MG is deeply colored, whereas the leuco and alcohol derivatives are not. This difference arises because only the cationic form has extended pi-delocalization, which allows the molecule to absorb visible light. The leuco form of malachite green was first prepared by Hermann Fischer in 1877 by condensing benzaldehyde and dimethylaniline in the molecular ratio 1:2 in the presence of sulfuric acid. Malachite green is traditionally used as a dye. Kilotonnes of MG and related triarylmethane dyes are produced annually for this purpose. MG is active against the oomycete "Saprolegnia", which infects fish eggs in
The Malachite Box she catches the eye of a young noble man. She promises to marry him if he shows her the Tsarina herself at the Malachite Room of the Palace. Danilo the Craftsman hears about a most beautiful Stone Flower grows in the domain of the Mistress of the Copper Mountain. He goes to the mine and begs the Mistress to show him the Flower. The Mistress warns Danilo that he would never want to go back to his people, but he insists. She then shows him the Malachite Flower. Danilo disappears from the village, leaving his fiancée Katyenka behind. Danilo's story