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CAS No 1787-61-7 , Eriochrome Black T

  • Name: Eriochrome Black T
  • Synonyms: C.I. 14645; Eriochrome (R) black T; Mordant Black 11; 3-Hydroxy-4-(1-hydroxy-2-naphthylazo)-7-nitro-1-naphthalenesulfonic acid, sodium salt; Eriochrome black T supra; Eriochrome Balck T; Mordant black 11; C.I.Mordant Black 11; C.I. 14645; Color index;Eriochrome Black T; 3-Hydroxy-4-(1-hydroxy-2-naphthylazo)-7-nitro-1-naphthalene sulfonic acid sodium salt; 2-Hydroxy-1-(1-hydroxy-2-naphthylazo)-6-nitro-4-naphthalenesulfonic acid, sodium salt; 1-Naphthalenesulfonic acid, 3-hydroxy-4-[(1-hydroxy-2-naphthyl)azo]-7-nitro-, monosodium salt; Eriochrome Balck T250; Eriochrome black T;Mordant Black 11 (14650); BT; Erichrome Black T;
  • CAS Registry Number:
  • Transport: UN 1230
  • Flash Point: °C
  • Boiling Point: °Cat760mmHg
  • Density: g/cm3
  • Water Solubility: 50 G/L (20 ºC)
  • Safety Statements: R36
  • Hazard Symbols: Xi: Irritant;
  • HS Code: 32041900
  • Flash Point: °C
  • EINECS: 217-250-3
  • Molecular Weight: 461.38
  • InChI: InChI=1/C20H13N3O7S.Na/c24-17-10-18(31(28,29)30)15-9-12(23(26)27)6-7-14(15)19(17)22-21-16-8-5-11-3-1-2-4-13(11)20(16)25;/h1-10,24-25H,(H,28,29,30);/q;+1/p-1/b22-21+;
  • Risk Statements: S26;S39
  • Molecular Formula: C20H12N3NaO7S
  • Molecular Structure:CAS No:1787-61-7 Eriochrome Black T

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References of Eriochrome Black T
Title: Eriochrome? Black T (Ciba)
CAS Registry Number: 1787-61-7
CAS Name: 3-Hydroxy-4-[(1-hydroxy-2-naphthalenyl)azo]-7-nitro-1-naphthalenesulfonic acid monosodium salt
Synonyms: C.I. Mordant Black 11; C.I. 14645
Molecular Formula: C20H12N3NaO7S
Molecular Weight: 461.38
Percent Composition: C 52.06%, H 2.62%, N 9.11%, Na 4.98%, O 24.27%, S 6.95%
Literature References: Prepn: Hagenbach, US 790363 (1904 to Geigy); Colour Index vol. 4 (3rd ed., 1971) p 4067.
Properties: Brownish-black powder with a faint metallic sheen. Sol in hot water giving a reddish-brown soln when cold. Violet-brown precipitate with excess HCl. Deep blue, then red in aq soln of NaOH. Sol in concd H2SO4 giving a blackish-blue soln which yields a brown precipitate on dilution.
Use: To dye wool from an acid bath reddish-black, which can be converted to blue-black by afterchroming. As indicator in the determination of the total calcium and magnesium content of water.