Malachite green (LMG) is used as a detection method for latent blood in forensic science. Hemoglobin catalyzes the reaction between LMG and hydrogen peroxide, converting the colorless LMG into malachite green. Therefore, the appearance of a green color indicates the presence of blood. In 1992, Canadian authorities determined that eating fish contaminated with malachite green posed a significant health risk. Malachite green was classified a Class II Health Hazard. Due to its low manufacturing cost, malachite green is still used in certain countries with less restrictive laws for non aquaculture purposes. In 2005, analysts in Hong Kong found traces of malachite green
The Malachite Box them so popular among the adult readers. They were exceptionally popular during the Great Patriotic War. The paperbacks were sent to the front line. The author received fan mail from the soldiers who asked to send them the book. The publication attracted a large number of folklorists, who collected tales near Sysert since 1940s and long after Pavel Bazhov's death. The characters of the Ural Mountains folklore such as the Mistress of the Copper Mountain became very well known after their appearance in Bazhov's "The Malachite Box". Sysert's old coat of arms (1982–2002) featured the Mistress as a lizard with