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CAS No 520-36-5 , 5,7-dihydroxy-2-(4-hydroxyphenyl)chromen-4-one Search by region : Germany

  • Name: 5,7-dihydroxy-2-(4-hydroxyphenyl)chromen-4-one
  • Synonyms: C.I. Natural Yellow 1; Versulin;Chamomile; Apigenol; 4',5,7-Trihydroxyflavone; 520-36-5;5,7-dihydroxy-2-(4-hydroxyphenyl)chromen-4-one; Apigenine; Spigenin;
  • CAS Registry Number:
  • Transport: OTH
  • Density: 1.548 g/cm3
  • Refractive index: 1.732
  • Water Solubility: DMSO: 27 mg/mL
  • Safety Statements: R36/37/38,
  • Hazard Symbols: Xi:Irritant;
  • EINECS: 208-292-3
  • Molecular Weight: 270.2369
  • InchiKey: KZNIFHPLKGYRTM-UHFFFAOYSA-N
  • InChI: InChI=1S/C15H10O5/c16-9-3-1-8(2-4-9)13-7-12(19)15-11(18)5-10(17)6-14(15)
    20-13/h1-7,16-18H
  • Risk Statements: S26,S36,
  • Molecular Formula: C15H10O5
  • Molecular Structure:CAS No:520-36-5 5,7-dihydroxy-2-(4-hydroxyphenyl)chromen-4-one

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References of 5,7-dihydroxy-2-(4-hydroxyphenyl)chromen-4-one
Title: Apigenin
CAS Registry Number: 520-36-5
CAS Name: 5,7-Dihydroxy-2-(4-hydroxyphenyl)-4H-1-benzopyran-4-one
Synonyms: 4￠,5,7-trihydroxyflavone; 2-(p-hydroxyphenyl)-5,7-dihydroxychromone; pelargidenon 1449
Molecular Formula: C15H10O5
Molecular Weight: 270.24
Percent Composition: C 66.67%, H 3.73%, O 29.60%
Literature References: The aglucon of apiin and of apigenin-7-glucoside. From apiin by boiling with acids, from apigenin-7-glucoside by enzymatic hydrolysis with emulsin or by boiling with 15% H2SO4. Isoln and structure: Czajkowski et al., Ber. 33, 1992 (1900); Schmid, Waschkau, Monatsh. Chem. 49, 83 (1928); Baker et al., J. Chem. Soc. 1963, 1477. Synthesis: Hutchins, Wheeler, ibid. 1939, 91; Farooq et al., Arch. Pharm. 292, 792 (1959).
Properties: Yellow needles from aqueous pyridine, mp 345-350°. uv max (ethanol): 269, 340 nm (e 18,800; 20,900). Practically insoluble in water; moderately sol in hot alcohol. Sol in dil KOH with intense yellow color.
Melting point: mp 345-350°
Absorption maximum: uv max (ethanol): 269, 340 nm (e 18,800; 20,900)
Use: Has been used to dye Cr mordanted wool yellow. The color is fast to soap.