A vial with a bright green alcoholic solution of "brilliant green" is the most famous medicine in the life of every person born in the USSR. There is not a single home first aid kit without green stuff. Meanwhile, nowhere in the world is it used anymore.
The history of the issue is as follows. In the middle of the 19th century in enlightened Europe, an inquisitive young chemist William Perkin in London tried to create a new cure for malaria and experimented with coal tar. I dripped acid on it, sublimated, distilled, etc. And suddenly he got a substance of a radical purple color, which he later called mauvein). The color turned out to be so persistent that the washerwoman could not remove the stains from his shirt. But papa Perkin, the builder, did not scold his son, but rejoiced: I don’t know how there is a cure for malaria, but you’ve already earned money for a piece of bread and butter.
And he opened the first plant for the production of resin (aniline) dyes. Willie gave up science and was so successful in the production of dyes that at the end of his life he was knighted and became sir.
In the same years, other organic dyes were synthesized: from black to yellow, including brilliant green. They quickly displaced natural dyes such as indigo or cochineal, which were much more expensive, but could not give a standard-lasting color to fabrics. In addition, doctors began to use new dyes to color preparations of various microorganisms in order to better examine them under a microscope. And they saw that these substances kill microbes outright. But this is how another path of dyes was determined - the medical one.
Today, other, more modern antiseptics are used in medicine. But the good old brilliant green is not written off from the account.
Apart from Russia and several countries in the post-Soviet space, diamond green is not used anywhere else in medicine, although, for example, in Europe, it is included in the list of approved medicines. There are three possible reasons. First, the doctrine of evidence-based medicine has been adopted in Western countries, and the molecular mechanism of action of this (and other) dyes is still unknown. Secondly, it is still not known for sure whether brilliant green has carcinogenic properties. Thirdly, when used for a drug, the aesthetic side is also important, which is why Western medicine also takes into account changes in the patient's appearance when using the drug.
Let's figure out what is so brilliant about it. Other dyes have more modest names. Dry, before dissolving in alcohol, these are golden-green lumps, in Latin viridis nitentis, that is, "green shiny". Translating the name into French, the unknown chemist used the word brillant - in French "brilliant". Well, some translator translated it as "brilliant".
Interesting facts about brilliant green:
It is interesting that in the Soviet and Russian criminal environment there is an expression “to smear (someone's) forehead with green stuff”, which originally meant execution (death penalty), and later - simply murder (with the help of firearms). This expression arose during the Stalinist repressions, when the prisoners' number was written on their thighs with greenery on their thighs to the executed or deceased prisoners. Therefore, initially there was an expression: “smear your leg with greenery”, but they began to talk about “forehead” later, although the forehead had nothing to do with writing the number with greenery.
Absolutely lethal dose of brilliant green for white rats 0.05 g / kg
In a number of bactericidal adhesive plasters it is used as an antiseptic impregnation.
Zelenka is a part of the preparation "Zar-2", which is used to restrict the growth of tendrils of strawberries and strawberries.
Zelenka is an artificial dye, its chemical formula is C27H33N2 * HC2O4 * H2O