Brilliant green (also known as or ) is one of the

triarylmethane dye Triarylmethane dyes are synthetic organic compounds containing triphenylmethane backbones. As dyes, these compounds are intensely colored. They are produced industrially as dyes. Families Triarylmethane dyes can be grouped into families accordin ...

s. It is closely related to

malachite green Malachite green is an organic compound that is used as a dyestuff and controversially as an antimicrobial in aquaculture. Malachite green is traditionally used as a dye for materials such as silk, leather, and paper. Despite its name the dye is ...

Uses

Brilliant green has been used to color

silk Silk is a natural protein fiber, some forms of which can be woven into textiles. The protein fiber of silk is composed mainly of fibroin and is produced by certain insect larvae to form cocoons. The best-known silk is obtained from the coc ...

and

wool Wool is the textile fibre obtained from sheep and other mammals, especially goats, rabbits, and camelids. The term may also refer to inorganic materials, such as mineral wool and glass wool, that have properties similar to animal wool. As ...

. It is indicated for disinfection of fresh postoperative and post-traumatic scars,

umbilical cord In placental mammals, the umbilical cord (also called the navel string, birth cord or ''funiculus umbilicalis'') is a conduit between the developing embryo or fetus and the placenta. During prenatal development, the umbilical cord is physiologic ...

of newborns, abrasions, cuts, and other violations of the integrity of the skin, in the treatment of purulent-inflammatory processes of the skin - hordeolum ("barley"), meibomite,

blepharitis Blepharitis is one of the most common ocular conditions characterized by inflammation, scaling, reddening, and crusting of the eyelid. This condition may also cause swelling, burning, itching, or a grainy sensation when introducing foreign objects ...

pyoderma Pyoderma means any skin disease that is pyogenic (has pus). These include superficial bacterial infections such as impetigo, impetigo contagiosa, ecthyma, folliculitis, Bockhart's impetigo, furuncle, carbuncle, tropical ulcer, etc.Page 348 in: Au ...

, local furunculosis, carbunculosis,

staphylococcal infection A staphylococcal infection or staph infection is an infection caused by members of the '' Staphylococcus'' genus of bacteria. These bacteria commonly inhabit the skin and nose where they are innocuous, but may enter the body through cuts or abrasi ...

. It is applied externally, the drug is applied to the damaged surface, capturing the surrounding healthy tissue. In

Russia Russia (, , ), or the Russian Federation, is a List of transcontinental countries, transcontinental country spanning Eastern Europe and North Asia, Northern Asia. It is the List of countries and dependencies by area, largest country in the ...

and

Ukraine Ukraine ( uk, Україна, Ukraïna, ) is a country in Eastern Europe. It is the second-largest European country after Russia, which it borders to the east and northeast. Ukraine covers approximately . Prior to the ongoing Russian inv ...

(and much of the rest of the former

Soviet Union The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, it was nominally a federal union of fifteen national ...

), the dilute alcoholic solution of brilliant green is sold as a topical

antiseptic An antiseptic (from Greek ἀντί ''anti'', "against" and σηπτικός ''sēptikos'', "putrefactive") is an antimicrobial substance or compound that is applied to living tissue/skin to reduce the possibility of infection, sepsis, or putre ...

, also known under a Latin name and the colloquial Russian name of (, in Russian), which is () in Ukrainian. A 1% solution in 60% alcohol can be used for treatment of skin. 0.5% solution is used for mucous membranes or for infants. Brilliant green is a visible light-activated

photocatalyst In chemistry, photocatalysis is the acceleration of a photoreaction in the presence of a catalyst. In catalyzed photolysis, light is absorbed by an adsorbed substrate. In photogenerated catalysis, the photocatalytic activity depends on the abil ...

in organic synthesis.

Safety and toxicity

Brilliant green is effective against

Gram-positive bacteria In bacteriology, gram-positive bacteria are bacteria that give a positive result in the Gram stain test, which is traditionally used to quickly classify bacteria into two broad categories according to their type of cell wall. Gram-positive bact ...

. The main advantage of brilliant green over the more common antiseptics such as

iodine Iodine is a chemical element with the symbol I and atomic number 53. The heaviest of the stable halogens, it exists as a semi-lustrous, non-metallic solid at standard conditions that melts to form a deep violet liquid at , and boils to a vi ...

is that it does not irritate mucous membranes as harshly on accidental contact. Soviet medical doctrine deemed it "not for use on mucosa" and cautions that it can cause eye damage and ophthalmic chemical burns and burns to an eye, at least in the typical formulations produced for medical use. Brilliant green induces vomiting when swallowed and is toxic when ingested. The compound may lead to serious injuries if it comes in contact with an eye, even resulting in bilateral

blindness Visual impairment, also known as vision impairment, is a medical definition primarily measured based on an individual's better eye visual acuity; in the absence of treatment such as correctable eyewear, assistive devices, and medical treatment� ...

due to

corneal opacification The human cornea is a transparent membrane which allows light to pass through it. The word corneal opacification literally means loss of normal transparency of cornea. The term corneal opacity is used particularly for the loss of transparency of c ...

Politics

and sometimes in

, has been used to physically attack political opponents. Since 2016, many opponents of the Russian government have been splashed with , including

Alexei Navalny Alexei Anatolievich Navalny ( rus, links=no, Алексей Анатольевич Навальный, , ɐlʲɪkˈsʲej ɐnɐˈtolʲjɪvʲɪtɕ nɐˈvalʲnɨj; born 4 June 1976) is a Opposition to Vladimir Putin in Russia, Russian opposition ...

, Igor Kalyapin, liberal activists,

Nadya Tolokonnikova Nadya Tolokonnikova ( rus, Надя Толоконникова, p=, full name Nadezhda Andreevna Tolokonnikova, rus, Надежда Андреевна Толоконникова, p=nɐˈdʲeʐdə təlɐˈkonʲːɪkəvə; born November 7, 1989) ...

Maria Alekhina Maria Vladimirovna "Masha" Alyokhina ( rus, Мария Владимировна "Маша" Алёхина, p=ɐˈlʲɵxʲɪnə; born June 6, 1988) is a Russian political activist. She is a member of the anti-Putinist punk rock group Pussy Rio ...

Lyudmila Ulitskaya Lyudmila Evgenyevna Ulitskaya (russian: link=no, Людмила Евгеньевна Улицкая, born February 21, 1943) is an internationally acclaimed modern Russian novelist and short-story writer who, in 2014, was awarded the prestigious A ...

, Ilya Varlamov and

Mikhail Kasyanov Mikhail Mikhailovich Kasyanov ( rus, link=no, Михаи́л Миха́йлович Касья́нов, , mʲɪxɐˈil mʲɪˈxajləvʲɪtɕ kɐˈsʲjanəf; born 8 December 1957) is a Russian politician who served as Prime Minister of Russia fr ...

.{{cite news , url = https://www.economist.com/blogs/economist-explains/2017/05/economist-explains-7 , title = Why are Russian opposition leaders' faces turning green? , newspaper =

The Economist ''The Economist'' is a British weekly newspaper printed in demitab format and published digitally. It focuses on current affairs, international business, politics, technology, and culture. Based in London, the newspaper is owned by The Econo ...

, date = May 10, 2017 , access-date = May 11, 2017

References

Triarylmethane dyes Antiseptics Staining dyes Anilines Diethylamino compounds zh:煌綠