1.07233

Phenolphthalein

pH indicator, ACS, Reag. Ph Eur

• Synonyme(s) : Phenolphthalein
• Formule empirique (notation de Hill): C₂₀H₁₄O₄
• Numéro CAS: 77-09-8
• Poids moléculaire : 318.32
• Numéro MDL: MFCD00005913
• Code UNSPSC : 12171502
• Numéro de classement CE : 201-004-7
• Nomenclature NACRES : NA.21

Propriétés

• product name: Phenolphthalein, indicator ACS,Reag. Ph Eur
• Qualité: ACS reagent
• Niveau de qualité: 200
• Agence: reag. Ph. Eur.; suitable for SM 2310; suitable for SM 2320
• Pression de vapeur: <0.00001 Pa ( 50 °C)
• Forme: solid
• Perte: ≤1% loss on drying, 105°C
• Couleur: white to yellow-white
• visual transition interval: 8.2-9.8, colorless to red-violet
• Pf: 263.7 °C
• Densité: 1.296 g/cm³ at 20 °C
• Masse volumique apparente: 350‑450 kg/m³
• λmax: 551-554 nm (buffer pH 9.8)
• Température de stockage: 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
• Clé InChI: KJFMBFZCATUALV-UHFFFAOYSA-N

Description

Application

• 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).

Remarque sur l'analyse

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 %

Informations sur la sécurité

• Pictogrammes: GHS07,GHS08
• Mention d'avertissement: Danger
• Mentions de danger: H315 - H341 - H350 - H361f
• Conseils de prudence: P202 - P264 - P280 - P302 + P352 - P308 + P313 - P332 + P313
• Classification des risques: Carc. 1B - Muta. 2 - Repr. 2 - Skin Irrit. 2
• Code de la classe de stockage: 6.1C - Combustible, acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects
• Classe de danger pour l'eau (WGK): WGK 3
• Point d'éclair (°F): Not applicable
• Point d'éclair (°C): Not applicable