Sudan red 7B

Structural formula
General
Surname	Sudan red 7B
other names	N -Ethyl-1 - [( E ) - {4 - [( E ) -phenyldiazenyl] phenyl} diazenyl] -2-naphthalenamine ( IUPAC ) CI Solvent Red 19 CI 26050 Fat red bluish
Molecular formula	C 24 H 21 N 5
Brief description	dark red solid
External identifiers / databases
CAS number 6368-72-5 EC number 228-862-5 ECHA InfoCard 100.026.238 PubChem 61396 ChemSpider 55325 Wikidata Q6518814
properties
Molar mass	379.46 g mol −1
Physical state	firmly
Melting point	130 ° C (decomposition)
safety instructions
GHS labeling of hazardous substances Caution H and P phrases H: 302 P: no P-phrases
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Sudan red 7B is a chemical compound from the group of bisazo dyes . It belongs to the Sudan dyes and to the application group of solvent dyes .

use

Sudan red 7B is used as a dye in microscopy. It was also used as a food coloring.

The German Mineral Oil Tax Act , in its original version from 1964, stipulated Sudan Red 7B (Solvent Red 19) as a coloring agent for marking tax-privileged mineral oils ( e.g. heating oil ). The compound is a powder dye, so its processing has some disadvantages, e.g. B. Risk of exposure in production and processing, time-consuming dissolution processes and insufficient cold stability of the prepared preliminary solutions. With the approval of modified dyes in 1977, the Mineral Oil Tax Act was adapted to current technical and industrial hygiene requirements. Liquid dyes have been used and processed since then.

safety instructions

The "International Agency for Research on Cancer" (IARC) classifies the dyes Sudan I – IV and Sudan Red 7B as Category 3 cancerogens. Category 3 substances give cause for concern because of their possible carcinogenic effects in humans, but cannot be conclusively assessed due to insufficient information.

Individual evidence

1. ↑ ^{a b c d e} Datasheet Sudan Red 7B, Dye content 95% from Sigma-Aldrich , accessed on November 9, 2016 ( PDF ).
2. ↑ Werner Franke: Testing of paper, cardboard, cellulose and wood pulp Volume 2: Microscopic and photometric methods . Springer-Verlag, 2013, ISBN 978-3-642-51105-9 , pp. 89 ( limited preview in Google Book search).
3. ↑ Amram Eshel, Tom Beeckman: Plant Roots The Hidden Half, Fourth Edition . CRC Press, 2013, ISBN 978-1-4398-4648-3 , pp. 4 ( limited preview in Google Book search).
4. ↑ J. Schormüller: Textbook of food chemistry . Springer-Verlag, 2013, ISBN 978-3-642-65778-8 , pp. 310 ( limited preview in Google Book search).
5. ↑ Technical rules for hazardous substances, restrictions on the use of azo dyes that can be split into carcinogenic aromatic amines (TRGS 614). (PDF) Annex 2: Colorants for marking mineral oils. In: Technical rules for hazardous substances (TRGS). Federal Institute for Occupational Safety and Health, March 2001, pp. 10–11 , accessed on November 21, 2019 . 
6. ↑ lci-koeln.de: LCI - Prohibited SUDAN DYES in Food - “Counterfeiters” at work , accessed on November 9, 2016.
7. ↑ Saskia Dombrowski: Reports on Food Safety 2009 National reporting to the EU - National Residue Control Plan (NRKP) and Import Residue Control Plan (ERKP) - Report on the official feed control 2009 . Springer-Verlag, 2011, ISBN 978-3-0348-0128-7 , pp. 18 ( limited preview in Google Book search).