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CAS No 115-40-2 , 2-bromo-4-[3-(3-bromo-4-hydroxy-5-methylphenyl)-1,1-dioxo-2,
1λ

  • Name: 2-bromo-4-[3-(3-bromo-4-hydroxy-5-methylphenyl)-1,1-dioxo-2,
    1λ
  • Synonyms: 5,5'-Dibromo-o-cresolsulfonphthalein; 115-40-2; SBB059133;Bromocresol purple;2-bromo-4-[3-(3-bromo-4-hydroxy-5-methylphenyl)-1,1-dioxo-2,
    1λ NSC374134;6-benzoxathiol-3-yl]-6-methylphenol; BROMCRESOL PURPLE; Bromcresol purple sultone form;
  • CAS Registry Number:
  • Transport: OTH
  • Melting Point: 245 ºC
  • Flash Point: 310.7°C
  • Boiling Point: 590.2°Cat760mmHg
  • Density: 1
  • Refractive index: 1.694
  • Safety Statements: R36/37/38
  • Hazard Symbols: Xi: Irritant;
  • HS Code: 29349990
  • Flash Point: 310.7°C
  • EINECS: 204-087-8
  • Molecular Weight: 540.22174
  • InchiKey: ABIUHPWEYMSGSR-UHFFFAOYSA-N
  • InChI: InChI=1S/C21H16Br2O5S/c1-11-7-13(9-16(22)19(11)24)21(14-8-12(2)20(25)17
    (23)10-14)15-5-3-4-6-18(15)29(26,27)28-21/h3-10,24-25H,1-2H3
  • Risk Statements: S26;S37/39
  • Molecular Formula: C21H16Br2O5S
  • Molecular Structure:CAS No:115-40-2 2-bromo-4-[3-(3-bromo-4-hydroxy-5-methylphenyl)-1,1-dioxo-2,<br />1λ

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References of 2-bromo-4-[3-(3-bromo-4-hydroxy-5-methylphenyl)-1,1-dioxo-2,
1λ
Title: Bromcresol Purple
CAS Registry Number: 115-40-2
CAS Name: 4,4￠-(3H-2,1-Benzoxathiol-3-ylidene)bis[2-bromo-6-methylphenol] S,S-dioxide
Synonyms: a-(5-bromo-4-hydroxy-m-tolyl)-a-(3-bromo-5-methyl-4-oxo-2,5-cyclohexadien-1-ylidene)-o-toluenesulfonic acid; 5,5￠-dibromo-o-cresolsulfonphthalein
Molecular Formula: C21H16Br2O5S
Molecular Weight: 540.22
Percent Composition: C 46.69%, H 2.99%, Br 29.58%, O 14.81%, S 5.94%
Literature References: Prepd by treating o-cresol red with bromine in glacial acetic acid: See refs under Bromcresol Green.
Properties: Minute, slightly yellow crystals, mp 241-242°. Practically insol in water. Sol in alcohol, dil alkalies. pK 6.3. To prepare a soln for use as pH indicator, dissolve 0.10 g in 9.25 ml N/50 NaOH and dil with water to 250 ml. To prepare a soln for use as indicator in volumetric work, dissolve 0.05 g in 250 ml alc.
Melting point: mp 241-242°
pKa: pK 6.3
Use: As indicator, pH 5.2 yellow; pH 6.8 purple.