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 (1936). Inspired by the success of the tales, Bazhov continued working on them. The tales "Sinyushka's Well", "Silver Hoof", and "The Demidov Caftans" were finished even before the publication of the first "The Malachite Box" edition. By 1938 the author finished 14 stories. Because of Bazhov's tense relationship with the Communist Party, they were published under two different pen names, either under the name "P. Bragin" or simply under his initials "P. B.". The name of Vasily Hmelinin was usually in the title as well. The first edition of "The Malachite Box" was released in several versions. The first copy