1.07233

Phenolphthalein

indicator ACS,Reag. Ph Eur

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

Properties

• Quality Level: 200
• grade: ACS reagent
• Agency: reag. Ph. Eur.
• vapor pressure: <0.00001 Pa ( 50 °C)
• form: solid
• loss: ≤1% loss on drying, 105°C
• color: white to yellow-white
• visual transition interval: 8.2-9.8, colorless to red-violet
• mp: 263.7 °C
• density: 1.296 g/cm³ at 20 °C
• bulk density: 350‑450 kg/m³
• λmax: 551-554 nm (buffer pH 9.8)
• storage temp.: 2-30°C
• InChI: 1S/C20H14O4/c21-15-9-5-13(6-10-15)20(14-7-11-16(22)12-8-14)18-4-2-1-3-17(18)19(23)24-20/h1-12,21-22H
• InChI key: KJFMBFZCATUALV-UHFFFAOYSA-N

Description

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 %

Safety Information

• Pictograms: GHS07,GHS08
• Signal Word: Danger
• Hazard Statements: H315 - H341 - H350 - H361f
• Precautionary Statements: P202 - P264 - P280 - P302 + P352 - P308 + P313 - P332 + P313
• Hazard Classifications: Carc. 1B - Muta. 2 - Repr. 2 - Skin Irrit. 2
• Storage Class Code: 6.1D - Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable