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 a crown, as did Yekaterinburg's coat of arms from 1973 to 1991. The early design of Polevskoy's coat of arms (1981) had an image of the Stone Flower. The current version, as well as the flag of the town, features the Mistress depicted as the golden lizard. The Malachite Casket became the symbol of the Urals. "The Malachite Box" is constantly republished, commented and illustrated. Not all stories are equally popular nowadays. The most popular tales were written between 1936 and 1939. Among the later stories, "A Fragile Twig" (1940), "The Fire-Fairy" (1940), "Tayutka's Mirror" (1941), "Ivanko Krylatko" (1943), "That