New fox

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Structural formula
Structure of Neufuchsin
General
Surname New fox
other names
  • 4 - [(4-Amino-m-tolyl) (4-imino-3-methylcyclohexa-2,5-dien-1-ylidene) methyl] -o-toluidine monohydrochloride
  • CI Basic Violet 2
  • CI 42520
  • Magenta 3
  • Neofuchsin
Molecular formula C 22 H 24 ClN 3
Brief description

green odorless solid

External identifiers / databases
CAS number
EC number 221-831-7
ECHA InfoCard 100,019,847
PubChem 18611
ChemSpider 17578
Wikidata Q7016415
properties
Molar mass 365.91 g mol −1
Physical state

firmly

solubility
  • little in water (10 g l −1 at 25 ° C)
  • good in ethanol
safety instructions
GHS labeling of hazardous substances
08 - Dangerous to health 07 - Warning 05 - Corrosive

danger

H and P phrases H: 318
P: 201-308 + 313
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Neufuchsin (also Basic Violet 2 ) is a cationic triphenylmethane dye that is dissolved in alcohol ( ethanol ) and used in microscopy and histology as well as in industry for staining . Neufuchsin has a red color in solution that turns slightly purple.

use

Neufuchsin is used as a dye for leather, paper and polyacrylonitrile .

In microbiology, it is used to dye acid-fast microorganisms, for example in the Ziehl-Neelsen dye . It can also be used as a Schiff's reagent for the elucidation of aldehydes.

In microscopy it is also used to color cellulose and lignin . Cellulose is colored red by Neufuchsin, structures containing lignin are colored purple. Neufuchsin, as part of an ACN staining solution, which, in addition to Neufuchsin contains astrablau and chrysoidin , can make all structure- forming components of plant cells distinguishable in color under the microscope.

See also

Individual evidence

  1. ↑ a b c d e data sheet New Fuchsin (PDF) at Merck , retrieved on October 21, 2019 .
  2. ↑ Template: CL Inventory / not harmonized There is not yet a harmonized classification for this substance . What is shown is a label for 4 - [(4-amino-m-tolyl) (4-imino-3-methylcyclohexa-2,5-dien-1-ylidene) methyl] -o-toluidine monohydrochloride im derived from a self-classification by the distributor Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on October 22, 2019.
  3. ↑ Registration dossier on 4 - [(4-amino-m-tolyl) (4-imino-3-methylcyclohexa-2,5-dien-1-ylidene) methyl] -o-toluidine monohydrochloride at the European Chemicals Agency (ECHA), accessed on October 22, 2019.
  4. ↑ Dye standards, Part II.8: New Fuchsin (CI 42520) In: Histochemical Journal. No. 24, 1992, pp. 240-242.
  5. ^ ACN multiple staining according to Schmitz. Retrieved October 22, 2019.