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CAS No 596-27-0 , 3,3-bis(4-hydroxy-3-methylphenyl)-2-benzofuran-1-one

  • Name: 3,3-bis(4-hydroxy-3-methylphenyl)-2-benzofuran-1-one
  • Synonyms: 3',3''-Dimethylphenolphthalein; EINECS 209-881-8;o-Cresolphthalein; Cresolphthalein;3,3-bis(4-hydroxy-3-methylphenyl)-2-benzofuran-1-one; 3,3'-Dimethylphenolphthalein; 596-27-0;
  • CAS Registry Number:
  • Transport: HAZARD
  • Melting Point: 223-225 ºC
  • Flash Point: 198.8°C
  • Boiling Point: 555°Cat760mmHg
  • Density: 1.32g/cm3
  • Refractive index: 1.668
  • Safety Statements: R40
  • Hazard Symbols: Xn: Harmful;
  • Flash Point: 198.8°C
  • EINECS: 209-881-8
  • Molecular Weight: 346.37592
  • InchiKey: CPBJMKMKNCRKQB-UHFFFAOYSA-N
  • InChI: InChI=1S/C22H18O4/c1-13-11-15(7-9-19(13)23)22(16-8-10-20(24)14(2)12-16)
    18-6-4-3-5-17(18)21(25)26-22/h3-12,23-24H,1-2H3
  • Risk Statements: S36/37
  • Molecular Formula: C22H18O4
  • Molecular Structure:CAS No:596-27-0 3,3-bis(4-hydroxy-3-methylphenyl)-2-benzofuran-1-one

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References of 3,3-bis(4-hydroxy-3-methylphenyl)-2-benzofuran-1-one
Title: o-Cresolphthalein
CAS Registry Number: 596-27-0
CAS Name: 3,3-Bis(4-hydroxy-3-methylphenyl)-1(3H)-isobenzofuranone
Synonyms: 3,3￠-dimethylphenolphthalein
Molecular Formula: C22H18O4
Molecular Weight: 346.38
Percent Composition: C 76.28%, H 5.24%, O 18.48%
Literature References: Prepn: F. J. Welcher, Organic Analytical Reagents vol. 4 (Van Nostrand, New York, 1948) p 482; Hubacher et al., J. Am. Pharm. Assoc. 42, 23 (1953).
Properties: Crystals from alc, mp 223°. Slightly sol in water; sol in alcohol. pK 9.4.
Melting point: mp 223°
pKa: pK 9.4
Use: As indicator: pH range, 8.2 colorless, 9.8 red. Analytical reagent.