114553

Thymolphthalein

ACS reagent, Dye content 95 %

• Synonym(e): 5′,5′′-Diisopropyl-2′,2′′-dimethylphenolphthalein
• Empirische Formel (Hill-System): C₂₈H₃₀O₄
• CAS-Nummer: 125-20-2
• Molekulargewicht: 430.54
• Beilstein: 359413
• EG-Nummer: 204-729-7
• MDL-Nummer: MFCD00005909
• UNSPSC-Code: 12171500
• PubChem Substanz-ID: 24847182
• NACRES: NA.47

Eigenschaften

• Qualität: ACS reagent
• Qualitätsniveau: 200
• Form: solid
• Zusammensetzung: Dye content, 95%
• Klarheit der Lösung: passes test
• Methode(n): titration: suitable
• visual transition interval: 8.8-10.5, colorless to blue
• mp (Schmelzpunkt): 251-253 °C (lit.)
• λmax: 396 nm (2nd); 592 nm
• SMILES String: CC(C)c1cc(c(C)cc1O)C2(OC(=O)c3ccccc23)c4cc(C(C)C)c(O)cc4C
• InChI: 1S/C28H30O4/c1-15(2)20-13-23(17(5)11-25(20)29)28(22-10-8-7-9-19(22)27(31)32-28)24-14-21(16(3)4)26(30)12-18(24)6/h7-16,29-30H,1-6H3
• InChIKey: LDKDGDIWEUUXSH-UHFFFAOYSA-N

Beschreibung

Allgemeine Beschreibung

Thymolphthalein (5′, 5′′-Diisopropyl-2′, 2′′-dimethylphenolphthalein) is an acid-base indicator which is colorless in solutions with a pH below 8.5 and blue in solutions with a pH above 9.5. Thymolphthalein has been used as an indicator in periodate-thiosulfate reaction.

Anwendung

Thymolphthalein has been used as a pH indicator in [¹⁴C] urea breath test to determine when the CO₂ trap is full.

Sicherheitshinweise

• Lagerklassenschlüssel: 11 - Combustible Solids
• WGK: WGK 3
• Flammpunkt (°F): Not applicable
• Flammpunkt (°C): Not applicable
• Persönliche Schutzausrüstung: Eyeshields, Gloves, type N95 (US)