Basic Green 1
Structural formula | ||||||||||||||||
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General | ||||||||||||||||
Surname | CI Basic Green 1 | |||||||||||||||
other names |
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Molecular formula | C 27 H 34 N 2 O 4 S | |||||||||||||||
Brief description |
green solid with a faint odor |
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properties | ||||||||||||||||
Molar mass | 482.64 g mol −1 | |||||||||||||||
Physical state |
firmly |
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density |
1.126 g cm −3 |
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Melting point |
210 ° C |
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boiling point |
Decomposes between 237 ° C and 279 ° C |
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solubility |
Easily soluble in water (100 g l −1 at 20 ° C) |
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safety instructions | ||||||||||||||||
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Toxicological data | ||||||||||||||||
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
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
- 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.