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CAS No 547-57-9 , Benzenesulfonic acid,4-[2-(2,4-dihydroxyphenyl)diazenyl]-, sodium salt (1:1)

  • Name: Benzenesulfonic acid,4-[2-(2,4-dihydroxyphenyl)diazenyl]-, sodium salt (1:1)
  • Synonyms: Chrysonine S;Orange Acid G; Hispacid Yellow CG; Neklacid Yellow G; Chrysoin; Tropaeoline; C.I. Acid Orange 6(7CI); Eurocert Chrysoine S;2,4-Dihydroxyazobenzene-4'-sulfonate sodium salt; Resorcinol Yellow A; E 103 (dye); Acid Phosphine G New;Gold yellow; Tropaeolin; C.I. Food Yellow 8;Chrysoin S Specially Pure; Acme Yellow Acid Yellow RS; Acid Leather Yellow PGW; Curol Orange G; Chrysoine S Extra Pure;Tropeolin O;Tertracid Yellow TRO; Orange VI;Chrysoine N; Resorcine Yellow OExtra; Resorcinol yellow; Tropaeolin O; Tropaeolin R; Sodium azoresorcinolsulfanilate; Eniacid Yellow RS; Naphthazine Yellow RP; Cetil Chromine Yellow GR; E 103; Chrysoin G;Dermina Yellow G; Resorcine Yellow; Resorcin yellow; C.I.14270;Benzenesulfonicacid, 4-[(2,4-dihydroxyphenyl)azo]-, monosodium salt (9CI); C.I. Acid Orange 6, monosodium salt (8CI);Benzenesulfonic acid,4-[2-(2,4-dihydroxyphenyl)diazenyl]-, sodium salt (1:1); AcidOrange 6; Chrysoine S;Benzenesulfonic acid, p-(2,4-dihydroxyphenylazo)-, sodium salt (6CI); C Yellow 12; Yellow T; Chrysoine; Chrysoine Extra Pure A; Chrysoin S (6CI); Chrysoine Extra;
  • CAS Registry Number:
  • Water Solubility: 4 - 5 g/l at room temperature, 200 g/l at 100C
  • Safety Statements: S26S36
  • Hazard Symbols: UN NO.
  • EINECS: 208-924-8
  • Molecular Weight: 316.27 . CODE
  • InChI: InChI=1S/C12H10N2O5S.Na/c15-9-3-6-11(12(16)7-9)14-13-8-1-4-10(5-2-8)20(17,18)19;/h1-7,13,16H,(H,17,18,19);/q;+1/p-1/b14-11-;
  • Risk Statements: S24/25 :Avoid contact with skin and eyes.;
  • Molecular Formula: C12H10 N2 O5 S . Na
  • Molecular Structure:CAS No:547-57-9 Benzenesulfonic acid,4-[2-(2,4-dihydroxyphenyl)diazenyl]-, sodium salt (1:1)

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References of Benzenesulfonic acid,4-[2-(2,4-dihydroxyphenyl)diazenyl]-, sodium salt (1:1)
Title: Tropaeolin O
CAS Registry Number: 547-57-9
CAS Name: 4-[(2,4-Dihydroxyphenyl)azo]benzenesulfonic acid monosodium salt
Synonyms: C.I. Acid Orange 6; sodium p-(2,4-dihydroxyphenylazo)benzenesulfonate; sodium azoresorcinolsulfanilate; C.I. Food Yellow 8; C.I. 14270; Resorcinol Yellow; Yellow T; Tropeolin O; Tropaeolin R; Chrysoine; Gold Yellow
Molecular Formula: C12H9N2NaO5S
Molecular Weight: 316.27
Percent Composition: C 45.57%, H 2.87%, N 8.86%, Na 7.27%, O 25.29%, S 10.14%
Literature References: Prepd from resorcinol and a p-sulfobenzenediazonium salt, followed by reaction with an inorganic sodium salt: Sisley, Bull. Soc. Chim. Fr. [3] 25, 869 (1901). See also: Colour Index vol. 4 (3rd ed., 1971) p 4064. Brief review: H. J. Conn's Biological Stains, R. D. Lillie, Ed. (Williams & Wilkins, Baltimore, 9th ed., 1977) p 106.
Properties: Brown powder. Sol in water with reddish-yellow color; sol in alcohol.
Use: As indicator. pH: yellow 11, orange-brown 12.7. Occasionally used as plasma stain.