70480

α-Naphtholbenzein

indicator (pH 8.2-10.0)

• Synonym(s): 4,4′-(α-Hydroxybenzylidene)di-1-naphthol, p-naphtholbenzein
• Empirical Formula (Hill Notation): C₂₇H₁₈O₂
• CAS Number: 145-50-6
• Molecular Weight: 374.43
• Beilstein: 2628063
• EC Number: 205-656-3
• UNSPSC Code: 12000000
• PubChem Substance ID: 24886093
• NACRES: NA.21

Properties

• grade: indicator (pH 8.2-10.0)
• Quality Level: 100
• form: powder
• technique(s): UV/Vis spectroscopy: suitable
• mp: 230-235 °C (lit.)
• 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-
• InChI key: VDDWRTZCUJCDJM-PNHLSOANSA-N

Description

General description

α-Naphtholbenzein is a dye generally used during acid-base titration method.

Application

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

Safety Information

• Hazard Statements: H413
• Precautionary Statements: P273 - P501
• Hazard Classifications: Aquatic Chronic 4
• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 2
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves