1.07233

Phenolphthalein

pH indicator, ACS, Reag. Ph Eur

• Sinonimo/i: Phenolphthalein
• Formula empirica (notazione di Hill): C₂₀H₁₄O₄
• Numero CAS: 77-09-8
• Peso molecolare: 318.32
• Numero MDL: MFCD00005913
• Codice UNSPSC: 12171502
• Numero indice EU: 201-004-7
• NACRES: NA.21

Proprietà

• product name: Phenolphthalein, indicator ACS,Reag. Ph Eur
• Grado: ACS reagent
• Livello qualitativo: 200
• agenzia: reag. Ph. Eur.; suitable for SM 2310; suitable for SM 2320
• Tensione di vapore: <0.00001 Pa ( 50 °C)
• Forma fisica: solid
• Perdita: ≤1% loss on drying, 105°C
• Colore: white to yellow-white
• visual transition interval: 8.2-9.8, colorless to red-violet
• Punto di fusione: 263.7 °C
• Densità: 1.296 g/cm³ at 20 °C
• Densità bulk: 350‑450 kg/m³
• λmax: 551-554 nm (buffer pH 9.8)
• Temperatura di conservazione: 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; KJFMBFZCATUALV-UHFFFAOYSA-N

Descrizione

Applicazioni

• 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).

Risultati analitici

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 %

Informazioni sulla sicurezza

• Pittogrammi: GHS07,GHS08
• Avvertenze: Danger
• Indicazioni di pericolo: H315 - H341 - H350 - H361f
• Consigli di prudenza: P202 - P264 - P280 - P302 + P352 - P308 + P313 - P332 + P313
• Classi di pericolo: Carc. 1B - Muta. 2 - Repr. 2 - Skin Irrit. 2
• Codice della classe di stoccaggio: 6.1C - Combustible, acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects
• Classe di pericolosità dell'acqua (WGK): WGK 3
• Punto d’infiammabilità (°F): Not applicable
• Punto d’infiammabilità (°C): Not applicable