1.07233

Phenolphthalein

pH indicator, ACS, Reag. Ph Eur

• Synonym(e): Phenolphthalein
• Empirische Formel (Hill-System): C₂₀H₁₄O₄
• CAS-Nummer: 77-09-8
• Molekulargewicht: 318.32
• MDL-Nummer: MFCD00005913
• UNSPSC-Code: 12171502
• EG-Index-Nummer: 201-004-7
• NACRES: NA.21

Eigenschaften

• product name: Phenolphthalein, indicator ACS,Reag. Ph Eur
• Qualität: ACS reagent
• Qualitätsniveau: 200
• Agentur: reag. Ph. Eur.; suitable for SM 2310; suitable for SM 2320
• Dampfdruck: <0.00001 Pa ( 50 °C)
• Form: solid
• Verlust: ≤1% loss on drying, 105°C
• Farbe: white to yellow-white
• visual transition interval: 8.2-9.8, colorless to red-violet
• mp (Schmelzpunkt): 263.7 °C
• Dichte: 1.296 g/cm³ at 20 °C
• Schüttdichte: 350‑450 kg/m³
• λmax: 551-554 nm (buffer pH 9.8)
• Lagertemp.: 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
• InChIKey: KJFMBFZCATUALV-UHFFFAOYSA-N

Beschreibung

Anwendung

• Effectiveness of Phenolphthalein in Sol-Gel Coatings for Sensing and Inhibiting Corrosion on Mild Steel: Research detailing the application of phenolphthalein and Thymol Blue in sol-gel coatings, demonstrating their effectiveness in corrosion inhibition and sensing on mild steel surfaces (Patra et al., 2024).



• Highly Permeable Ultrafiltration Membranes Based on Polyphenylene Sulfone with Cardo Fragments: This article discusses the development of advanced ultrafiltration membranes incorporating phenolphthalein, enhancing their permeability and filtration efficiency (Raeva et al., 2024).



• A fluorescence-based dual sensor for Zn(2+) and PO(4)(3-): Study on a dual sensor system utilizing phenolphthalein, applied for the detection of zinc and phosphate ions in various environmental and biological samples, employing fluorescence signaling (Samanta et al., 2024).

Hinweis zur Analyse

Identität (UV/VIS-Spektrum): entspricht
Aussehen: Weißes bis gelblich-weißes Pulver
Klarheit der alkoholischen Lösung (10 g/l Ethanol): entspricht
Absorptionsmaximum λ_max. (Puffer pH-Wert 9,8). 551–554 nm
Spez. Absorptionsgrad A 1 %/1 cm (λ_max; 0,01 g/l; Puffer pH-Wert 9,8; berechnet auf getrocknete Substanz): 700–750
Übergangsbereich: pH-Wert 8,2 bis pH-Wert 9,8 nahezu farblos - rotviolett
Übergangsbereich (gemäß ACS): entspricht
Übergangsintervall (gemäß Reag. Ph. Eur.): entspricht
Trocknungsverlust (105 °C): ≤ 1 %

Sicherheitshinweise

• Piktogramme: GHS07,GHS08
• Signalwort: Danger
• H-Sätze: H315 - H341 - H350 - H361f
• P-Sätze: P202 - P264 - P280 - P302 + P352 - P308 + P313 - P332 + P313
• Gefahreneinstufungen: Carc. 1B - Muta. 2 - Repr. 2 - Skin Irrit. 2
• Lagerklassenschlüssel: 6.1C - Combustible, acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects
• WGK: WGK 3
• Flammpunkt (°F): Not applicable
• Flammpunkt (°C): Not applicable