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 Casket (fairy tale) and performed by the State Symphony Cinema Orchestra. The Malachite Casket (fairy tale) "The Malachite Casket" (), also known as "The Malachite Box", is a folk tale (the so-called "skaz") of the Ural region collected and reworked by Pavel Bazhov. It was first published in the several issues of the Sverdlovsk newspaper "Na Smenu!" in September—November 1938, and in "Uralsky Sovremennik" (volume 1, 1938). It was later released as a part of "The Malachite Casket" collection. "The Malachite Casket" is considered to be one of the best stories in the collection. The story was translated from Russian into English by