Malachite green result. Numerous niche applications exploit the intense color of MG. It is used as a biological stain for microscopic analysis of cell biology and tissue samples. In the Gimenez staining method, basic fuchsin stains bacteria red or magenta, and malachite green is used as a blue-green counterstain. Malachite green is also used in endospore staining, since it can directly stain endospores within bacterial cells; here a safranin counterstain is often used. Malachite green can also be used as a saturable absorber in dye lasers, or as a pH indicator between pH 0.2–1.8. However, this use is relatively rare. Leuco-malachite green
Italian submarine Malachite she again patrolled of Ras Aamer. From 11 to 23 February, 1942 she was deployed to an area off the coast of Cyrenaica. From 8 to 21 April, 1942 again she was again deployed off the coast of Cyrenaica. From 1 June to 9 June, 1942 and then again from June 15 to 18, 1942 "Malachite" was posted northwest of Algiers. She was then relocated to patrol off Cape Blanc from 22 to 24 June. On July 16 1942 "Malachite" was sent to patrol along the Tunisian coast, however had to return to the base the next day due to