توضیحات

فنل فتالئين كد 9046 كمپاني اينترچم انگلستان

Phenolphthalein

indicator ACS,Reag

Synonym: Phenolphthalein

• CAS Number 77-09-8
• Empirical Formula (Hill Notation) C₂₀H₁₄O₄
• Molecular Weight 318.32
•  MDL number MFCD00005913
•  EC Index Number 201-004-7

• Analysis Note

  Identity (UV/VIS-Spectrum): passes test
  Appearance: White to yellowish white powder
  Clarity of the alkoholic solution (10 g/l ethanol): passes test
  Absorption maximum λ_max. (buffer pH 9.8): 551 – 554 nm
  Spec. Absorptivity A 1%/1cm (λ_max; 0.01 g/l; buffer pH 9.8; calculated on dried substance): 700 – 750
  Transition range: pH 8.2 – pH 9.8 almost colorless – red-violet
  Transition range (according to ACS): passes test
  Transition interval (according Reag. Ph Eur): passes test
  Loss on drying (105 °C): ≤ 1 %