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).
• Analysis Note: Identity (UV/VIS-Spectrum): passes testAppearance: White to yellowish white powderClarity of the alkoholic solution (10 g/l ethanol): passes testAbsorption maximum λmax. (buffer pH 9.8): 551 - 554 nmSpec. Absorptivity A 1%/1cm (λmax; 0.01 g/l; buffer pH 9.8; calculated on dried substance): 700 - 750Transition range: pH 8.2 - pH 9.8 almost colorless - red-violetTransition range (according to ACS): passes testTransition interval (according Reag. Ph Eur): passes testLoss on drying (105 °C): ≤ 1 %