Malachite green colored cation. The oxalate salt is also marketed. The anions have no effect on the color. The intense green color of the cation results from a strong absorption band at 621 nm (extinction coefficient of ). Malachite green is prepared by the condensation of benzaldehyde and dimethylaniline to give leuco malachite green (LMG): Second, this colorless leuco compound, a relative of triphenylmethane, is oxidized to the cation that is MG: A typical oxidizing agent is manganese dioxide. Hydrolysis of MG gives an alcohol: This alcohol is important because it, not MG, traverses cell membranes. Once inside the cell, it is
Italian submarine Malachite both miss. "Malachite" was forced to dive and undergo lengthy depth charge attack. From 10 to 18 April 1941 she was posted northeast of the Gulf of Sollum. At 23:37 on April 14 "Malachite" sighted a large convoy but was prevented from attacking it due to preemptive action by the escorts. On May 20, 1941 "Malachite" together with numerous other submarines was deployed to an area between Crete, Alexandria and Sollum, to support the German invasion of Crete (Operation Merkur). "Malachite"'s area operation was south of the island of Gaidaro. On the night of June 19, 1941 while patrolling off