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 The Malachite Box The Malachite Box or The Malachite Casket () is a book of fairy tales and folk tales (also known as "skaz") of the Ural region of Russia compiled by Pavel Bazhov and published from 1936 to 1945. It is written in contemporary language and blends elements of everyday life with fantastic characters. It was awarded the Stalin prize in 1942. Bazhov's stories are based on the oral lore of the miners and gold prospectors. The first edition of "The Malachite Box" was released on 28 January 1939. It consisted of 14 stories and an introduction, which contained