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CAS No 1934-21-0 , trisodium Search by region : China

  • Name: trisodium
  • Synonyms: Kako Tartrazine; Aizen tartrazine;trisodium; Tartrazine Lake; A.F. Yellow No. 4; 1934-21-0;Acid yellow 23; Atul Tartrazine; Erio Tartrazine;5-oxo-1-(4-sulfonatophenyl)-4-[(4-sulfonatophenyl)diazenyl]-
    4H-pyrazole-3-carboxylate; Yellow 5;
  • CAS Registry Number:
  • Density: 1.93 g/cm3 (20 C)
  • Safety Statements: S24/25
  • Hazard Symbols: Xn
  • EINECS: 217-699-5
  • Molecular Weight: 534.363368
  • InchiKey: UJMBCXLDXJUMFB-UHFFFAOYSA-K
  • InChI: InChI=1S/C16H12N4O9S2.3Na/c21-15-13(18-17-9-1-5-11(6-2-9)30(24,
    25)26)14(16(22)23)19-20(15)10-3-7-12(8-4-10)31(27,28)29;;;/h1-8,13H,(H,
    22,23)(H,24,25,26)(H,27,28,29);;;/q;3*+1/p-3
  • Risk Statements: S24/25,
  • Molecular Formula: C16H9N4Na3O9S2
  • Molecular Structure:CAS No:1934-21-0 trisodium

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References of trisodium
Title: Tartrazine
CAS Registry Number: 1934-21-0
CAS Name: 4,5-Dihydro-5-oxo-1-(4-sulfophenyl)-4-[(4-sulfophenyl)azo]-1H-pyrazole-3-carboxylic acid trisodium salt
Synonyms: C.I. Acid Yellow 23; 3-carboxy-5-hydroxy-1-p-sulfophenyl-4-p-sulfophenylazopyrazole trisodium salt; 5-hydroxy-1-(p-sulfophenyl)-4-[(p-sulfophenyl)azo]pyrazole-3-carboxylic acid trisodium salt; hydrazine yellow; C.I. 19140; FD & C Yellow No. 5; C.I. Food Yellow 4
Molecular Formula: C16H9N4Na3O9S2
Molecular Weight: 534.36
Percent Composition: C 35.96%, H 1.70%, N 10.48%, Na 12.91%, O 26.95%, S 12.00%
Literature References: Prepn: US 2457823 (1949 to Ilford); Freeman et al., J. Assoc. Off. Agric. Chem. 33, 937 (1950). See also: Colour Index vol. 4 (3rd ed., 1971) p 4132.
Properties: Bright orange-yellow powder. Freely sol in water. The aq soln is not changed by HCl but becomes redder with sodium hydroxide.
Use: As a dye for wool and silks; as colorant in food, drugs and cosmetics. In biochemistry as an adsorption-elution indicator for chloride estimations.