291099

α-Naphtholbenzein

indicator grade

• Synonym(e): α,α-Bis-(4-hydroxy-1-naphthyl)-benzylalkohol
• Empirische Formel (Hill-System): C₂₇H₁₈O₂
• CAS-Nummer: 145-50-6
• Molekulargewicht: 374.43
• Beilstein: 2628063
• EG-Nummer: 205-656-3
• UNSPSC-Code: 12171500
• PubChem Substanz-ID: 24857510
• NACRES: NA.47

Eigenschaften

• Qualität: indicator grade
• Qualitätsniveau: 100
• Form: powder
• Methode(n): titration: suitable
• Farbe: faintly Faint Brown to Very Dark Brown to Very Dark Red and Black
• pH-Wert: 0.0, green; 0.8, yellow; 10.0, blue-green; 8.2, yellow
• mp (Schmelzpunkt): 230-235 °C (lit.)
• ε (Extinktionskoeffizient): ≥50000 at 207-213 nm in methanol at 0.01 g/L
• Anwendung(en): diagnostic assay manufacturing; hematology; histology
• Lagertemp.: room temp
• SMILES String: Oc1ccc(\C(c2ccccc2)=C3\C=CC(=O)c4ccccc34)c5ccccc15
• InChI: 1S/C27H18O2/c28-25-16-14-23(19-10-4-6-12-21(19)25)27(18-8-2-1-3-9-18)24-15-17-26(29)22-13-7-5-11-20(22)24/h1-17,28H/b27-24-
• InChIKey: VDDWRTZCUJCDJM-PNHLSOANSA-N

Beschreibung

Allgemeine Beschreibung

α-Naphtholbenzein is a dye belonging to the Benzein family insoluble in water and soluble in alcohol. α-Naphtholbenzein is primarily used as an indicator for pH range 8.2-10.0 (mostly in acid-base titrations), causing a color change for the neutral solutions turning alkaline. Its applications include detection of bacterial growth in packed food, viable cells, enzymes, ammonia odors in patients with bacterial infection, and many more.

Anwendung

α-Naphtholbenzein has been used as an indicator during sequential injection analysis technique done for acid-base titrations.

Sicherheitshinweise

• H-Sätze: H413
• P-Sätze: P273 - P501
• Gefahreneinstufungen: Aquatic Chronic 4
• Lagerklassenschlüssel: 11 - Combustible Solids
• WGK: WGK 2
• Flammpunkt (°F): Not applicable
• Flammpunkt (°C): Not applicable
• Persönliche Schutzausrüstung: dust mask type N95 (US), Eyeshields, Gloves