Malachite green is retained in catfish muscle longer (HL = 10 days) than is the parent molecule (HL = 2.8 days). The (oral, mouse) is 80 mg/kg. Rats fed malachite green experience "a dose-related increase in liver DNA adducts" along with lung adenomas. Leucomalachite green causes an "increase in the number and severity of changes". As leucomalachite green is the primary metabolite of malachite green and is retained in fish muscle much longer, most human dietary intake of malachite green from eating fish would be in the leuco form. During the experiment, rats were fed up to 543 ppm of leucomalachite green,
The Malachite Box continued in "The Master Craftsman" (alternative translations: "The Mountain Craftsman", "The Mountain Master"), published a year later in "Na Smenu!". "A Fragile Twig", published in 1940, focuses on Katyenka and Danilo's son. Bazhov had plans for the fourth story, but it was never written. "Golden Hair" is based on the Bashkirs folklore. It tell the story of a Bashkir hunter Ailyp who meets the daughter of Poloz the Great Snake. In addition to the stories mentioned above, the first edition of "The Malachite Box" contained the following 8 stories: "The Manager's Boot-Soles", "Sochen and His Stones", "Marko's Hill", "The Twisted