291099

α-Naphtholbenzein

indicator grade

• Sinonimo/i: 4,4′-(α-Hydroxybenzylidene)di-1-naphthol, p-naphtholbenzein
• Formula empirica (notazione di Hill): C₂₇H₁₈O₂
• Numero CAS: 145-50-6
• Peso molecolare: 374.43
• Beilstein: 2628063
• Numero CE: 205-656-3
• Codice UNSPSC: 12171500
• ID PubChem: 24857510
• NACRES: NA.47

Proprietà

• Grado: indicator grade
• Forma fisica: powder
• Colore: 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
• Punto di fusione: 230-235 °C (lit.)
• ε (coefficiente d’estinzione): ≥50000 at 207-213 nm in methanol at 0.01 g/L
• applicazioni: diagnostic assay manufacturing; hematology; histology
• Temperatura di conservazione: room temp
• Stringa SMILE: 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-; VDDWRTZCUJCDJM-PNHLSOANSA-N

Descrizione

Descrizione generale

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.

Applicazioni

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

Informazioni sulla sicurezza

• Indicazioni di pericolo: H413
• Consigli di prudenza: P273 - P501
• Classi di pericolo: Aquatic Chronic 4
• Codice della classe di stoccaggio: 11 - Combustible Solids
• Classe di pericolosità dell'acqua (WGK): WGK 2
• Punto d’infiammabilità (°F): Not applicable
• Punto d’infiammabilità (°C): Not applicable
• Dispositivi di protezione individuale: dust mask type N95 (US), Eyeshields, Gloves