C85778

o-Cresolphthalein

Indicator grade, powder

• Empirische Formel (Hill-System): C₂₂H₁₈O₄
• CAS-Nummer: 596-27-0
• Molekulargewicht: 346.38
• Beilstein: 310554
• EG-Nummer: 209-881-8
• MDL-Nummer: MFCD00005912
• UNSPSC-Code: 12171500
• PubChem Substanz-ID: 24893078
• NACRES: NA.47

Eigenschaften

• product name: o-Cresolphthalein, indicator grade
• Qualität: indicator grade
• Qualitätsniveau: 200
• Form: powder
• Methode(n): titration: suitable
• Farbe: beige
• pH-Wert: 8.2-9.8, colorless to red
• mp (Schmelzpunkt): 219-221 °C (lit.)
• λmax: 381 nm (2nd); 566 nm
• ε (Extinktionskoeffizient): ≥10000 at 294-300 nm; ≥39000 at 564-570 nm; ≥5000 at 378-384 nm
• Anwendung(en): diagnostic assay manufacturing; hematology; histology
• Lagertemp.: room temp
• SMILES String: Cc1cc(ccc1O)C2(OC(=O)c3ccccc23)c4ccc(O)c(C)c4
• InChI: 1S/C22H18O4/c1-13-11-15(7-9-19(13)23)22(16-8-10-20(24)14(2)12-16)18-6-4-3-5-17(18)21(25)26-22/h3-12,23-24H,1-2H3
• InChIKey: CPBJMKMKNCRKQB-UHFFFAOYSA-N

Beschreibung

Anwendung

O-Cresolphthalein has been used as a component in calcifying media for calcification assay.

Biochem./physiol. Wirkung

o-Cresolphthalein is a reversible pH indicator. The kinetics of the reverse pathway (red-purple to colorless) is slow, thereby making it an appropriate molecule to check flow patterns in ducts with corrugated walls. It is also used for the colorimetric determination of calcium content via the o-cresolphthalein complexone method. Binding of calcium to o-cresolphthalein, in the presence of alkaline conditions (pH 10-12), results in the formation of a red complex with an absorbance at 570-575nm.

Sicherheitshinweise

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