Basic Green 1

Structural formula
General
Surname	CI Basic Green 1
other names	Brilliant green; Ethyl green; Diamond green G; Malachite green G; 4 - {[4- (Diethylamino) phenyl] (phenyl) methylene} - N , N -diethyl-2,5-cyclohexadiene-1-iminium hydrogen sulfate ( IUPAC );
Molecular formula	C 27 H 34 N 2 O 4 S
Brief description	green solid with a faint odor
External identifiers / databases
EC number	211-190-1
ECHA InfoCard	100.010.174
PubChem	12449
Wikidata	Q427105
properties
Molar mass	482.64 g mol −1
Physical state	firmly
density	1.126 g cm −3
Melting point	210 ° C
boiling point	Decomposes between 237 ° C and 279 ° C
solubility	Easily soluble in water (100 g l −1 at 20 ° C)
safety instructions
GHS labeling of hazardous substances Caution
H and P phrases	H: 302-319
	P: 305 + 351 + 338
Toxicological data	313 mg kg −1 ( LD 50 , rat , oral )
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

CI Basic Green 1 is a cationic dye from the group of triphenylmethane dyes . It is soluble in water and alcohol, the solutions are green in color. In the pH range between 0.0 and 2.6 the color changes from yellow to green. It is known as Viride nitens in Latin .

properties

Basic Green 1 is a flammable green solid with a faint odor that is easily soluble in water. It decomposes at temperatures above 210 ° C. Its aqueous solution is acidic. The green color is due to the existence of several mesomeric boundary structures :

use

"Seljonka" bottles

Basic Green 1 was widely used in biochemistry . The brilliant green bile medium is used for the selective enrichment and counting of coliform bacteria in milk, water and other samples. It is a mesomeric stabilized quaternary ammonium salt .

Basic Green 1 is used for dyeing and printing textiles, leather and paper as well as in printing inks, inks, ribbons and ballpoint pen pastes.

In Eastern Europe and the countries of the former USSR , the alcoholic solution of Basic Green 1 ( Solutio viridis nitentis spirituosa 1% ) is used as an antiseptic . In everyday language the substance is called Russian зелёнка "seljonka". A Seljonka attack is a form of protest, provocation or violent attack on a person that is doused with the green color solution mainly on the face. In the 2010s this was widespread in Russia and Ukraine . As a result, the seljonka - and the green color in general - became a symbol of political protest in Russia.

Web links

Commons : Brillantgrün - Collection of images, videos and audio files

Brilliant Green Bile Medium - For the selective enrichment and counting of coliform bacteria in milk, water and other samples

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ Entry on brilliant green in the GESTIS substance database of the IFA , accessed on December 22, 2019(JavaScript required) .
↑ ^a ^b Basic Green 1 data sheet from Sigma-Aldrich , accessed on March 14, 2011 ( PDF ).

↑ M. Balabanova, L. Popova, R. Tchipeva, Disease-a-Month , 50 (6), 2004 , 270-279. doi: 10.1016 / j.disamonth.2004.05.002 .

↑ Maria Balabanova, Liudmila Popova, Rositsa Tchipeva: Dyes in dermatology . In: Clinics in Dermatology . tape 21 , no. 1 , January 1, 2003, p. 2-6 , doi : 10.1016 / S0738-081X (02) 00330-9 ( sciencedirect.com [accessed May 8, 2017]).

↑ Julia Smirnova: Russia: When it comes to chemical attacks on critics, the Kremlin looks the other way . The world . May 3, 2017. Retrieved May 6, 2017.

[GESTIS-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ Entry on brilliant green in the GESTIS substance database of the IFA , accessed on December 22, 2019(JavaScript required) .

[Sigma-2] Basic Green 1 data sheet from Sigma-Aldrich , accessed on March 14, 2011 ( PDF ).

[3] M. Balabanova, L. Popova, R. Tchipeva, Disease-a-Month , 50 (6), 2004 , 270-279. doi: 10.1016 / j.disamonth.2004.05.002 .

[4] Maria Balabanova, Liudmila Popova, Rositsa Tchipeva: Dyes in dermatology . In: Clinics in Dermatology . tape 21 , no. 1 , January 1, 2003, p. 2-6 , doi : 10.1016 / S0738-081X (02) 00330-9 ( sciencedirect.com [accessed May 8, 2017]).

[5] Julia Smirnova: Russia: When it comes to chemical attacks on critics, the Kremlin looks the other way . The world . May 3, 2017. Retrieved May 6, 2017.