291099

α-Naphtholbenzein

indicator grade

• Synonyme(s) : 4,4′-(α-Hydroxybenzylidene)di-1-naphthol, p-naphtholbenzein
• Formule empirique (notation de Hill): C₂₇H₁₈O₂
• Numéro CAS: 145-50-6
• Poids moléculaire : 374.43
• Numéro Beilstein : 2628063
• Numéro CE : 205-656-3
• Code UNSPSC : 12171500
• ID de substance PubChem : 24857510
• Nomenclature NACRES : NA.47

Propriétés

• Qualité: indicator grade
• Forme: powder
• Couleur: faintly Faint Brown to Very Dark Brown to Very Dark Red and Black
• pH: 0.0, green; 0.8, yellow; 10.0, blue-green; 8.2, yellow
• Pf: 230-235 °C (lit.)
• ε (coefficient d'extinction): ≥50000 at 207-213 nm in methanol at 0.01 g/L
• Application(s): diagnostic assay manufacturing; hematology; histology
• Température de stockage: room temp
• Chaîne SMILES: 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-
• Clé InChI: VDDWRTZCUJCDJM-PNHLSOANSA-N

Description

Description générale

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.

Application

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

Informations sur la sécurité

• Mentions de danger: H413
• Conseils de prudence: P273 - P501
• Classification des risques: Aquatic Chronic 4
• Code de la classe de stockage: 11 - Combustible Solids
• Classe de danger pour l'eau (WGK): WGK 2
• Point d'éclair (°F): Not applicable
• Point d'éclair (°C): Not applicable
• Équipement de protection individuelle: dust mask type N95 (US), Eyeshields, Gloves