Orange G

from Wikipedia, the free encyclopedia
Structural formula
Structural formula of Orange G
General
Surname Orange G
other names
  • Disodium 7-hydroxy-8 - [( E ) -phenyldiazenyl] -1,3-naphthalene disulfonate ( IUPAC )
  • CI Acid Orange 10
  • CI 16230
  • CI Food Orange 4
  • Wool Orange 2G
  • Gold orange GN
Molecular formula C 16 H 10 N 2 Na 2 O 7 S 2
Brief description

orange to red solid

External identifiers / databases
CAS number
  • 1936-15-8
  • 14245-98-8 (free acid)
EC number 217-705-6
ECHA InfoCard 100.016.096
PubChem 16015
ChemSpider 10468647
Wikidata Q1117877
properties
Molar mass 452.37 g mol −1
Physical state

firmly

density

0.45-0.47 g cm -3

Melting point

141 ° C

solubility
  • soluble in water
  • slightly soluble in ethanol
  • insoluble in xylene
safety instructions
GHS labeling of hazardous substances
no GHS pictograms
H and P phrases H: no H-phrases
P: no P-phrases
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Orange G is an orange azo dye that is required for Masson-Goldner trichrome staining . Orange G can also be used in the loading buffer of an agarose gel electrophoresis . It is yellow at a pH of 11.5 and pink at a pH of 14.0.

presentation

Orange G is obtained by an azo coupling of diazotized aniline to 7-hydroxynaphthalene-1,3-disulfonic acid (G-acid).

Individual evidence

  1. ↑ a b c d R. W. Sabnis: Handbook of Biological Dyes and Stains: Synthesis and Industrial Applications . John Wiley & Sons, 2010, ISBN 0-470-58623-0 , pp. 352 ( limited preview in Google Book search).
  2. ↑ External identifiers or database links for Orange G, free acid : CAS number: 14245-98-8 , PubChem : 16016 , ChemSpider : 10443852 , Wikidata : Q2715936 .
  3. ↑ a b c Data Sheet Orange G (PDF) from Fisher Scientific , accessed May 25, 2017.
  4. ↑ Data sheet Orange G from Sigma-Aldrich , accessed on May 25, 2017 ( PDF ).