Acid Orange 5

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Structural formula
Structural formula of CI Acid Orange 5
General
Surname Acid Orange 5
other names
  • Sodium 4 - [(4-anilinophenyl) diazenyl] benzenesulfonate ( IUPAC )
  • CI 13080
  • Orange IV
  • Tropaolin OO
Molecular formula C 18 H 14 N 3 NaO 3 S
Brief description

Orange flakes or yellow powder

External identifiers / databases
CAS number
  • 554-73-4
  • 17040-79-8 (free acid)
EC number 209-071-4
ECHA InfoCard 100.008.248
PubChem 23668839
ChemSpider 17967058
Wikidata Q6270611
properties
Molar mass 375.4 g mol −1
Physical state

firmly

safety instructions
GHS labeling of hazardous substances
07 - Warning

Caution

H and P phrases H: 315-319-335
P: 261-305 + 351 + 338
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

CI Acid Orange 5 is an azo dye from the application group of acid dyes , which is used as a wool dye and indicator .

Manufacturing

Acid Orange 5 is by diazotization of sulfanilic acid and subsequent azo coupling with diphenylamine prepared.

use

Acid Orange 5 is used as a dye for dyeing wool. It also serves as an indicator with a color change from violet-red to yellow in the pH range from 1.2 to 3.2.

Individual evidence

  1. ↑ Tropaeolin . In: Jürgen Falbe, Manfred Regitz (Hrsg.): RÖMPP Lexikon Chemie . 6: TZ. Georg Thieme Verlag, Stuttgart, New York 1999, ISBN 3-13-735110-3 , pp. 4683 ( limited preview in Google Book search).
  2. ↑ External identifiers of or database links to 4 - [(4-anilinophenyl) diazenyl] benzenesulfonic acid : CAS number: 17040-79-8, EC number: 241-110-0, ECHA InfoCard: 100.037.358 , PubChem : 11134 , ChemSpider : 21160524 , Wikidata : Q81976989 .
  3. ↑ a b Data sheet Sodium 4 - [(4-anilinophenyl) diazenyl] -benzenesulfonate Template: link text check / apostrophe from Sigma-Aldrich , accessed on August 5, 2019 ( PDF ).
  4. ^ A b c Hermann Römpp: Chemistry Lexicon . Volume III PZ. Franckh'sche Verlagshandlung, Stuttgart 1962, p. 5254 .