alpha-Naphtholbenzein

Description

CAS: 145-50-6 | C27H18O2 | 374.439 g/mol

α-Naphtholbenzein is used as a pH indicator. (pH 0.0-0.8/ pH 8.2-10.0).

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

Applications
α-Naphtholbenzein is used as a pH indicator. (pH 0.0-0.8/ pH 8.2-10.0).

Solubility
Soluble in ethanol, acetic acid and acetone. Insoluble in water.

Notes
Incompatible with strong oxidizing agents, acids, water reactive substances, azo, diazo, hydrazines, metals, nitrides, peroxides, hydroperoxides, epoxides and reducing agents.

Specifications

Chemical Identifiers

• CAS: 145-50-6
• Molecular Formula: C27H18O2
• Molecular Weight (g/mol): 374.439
• MDL Number: MFCD00078492
• InChI Key: VDDWRTZCUJCDJM-PNHLSOANSA-N
• PubChem CID: 5941340
• IUPAC Name: (4Z)-4-[(4-hydroxynaphthalen-1-yl)-phenylmethylidene]naphthalen-1-one
• SMILES: C1=CC=C(C=C1)C(=C2C=CC(=O)C3=CC=CC=C23)C4=CC=C(C5=CC=CC=C54)O

• Melting Point: ∼225°C (decomposition)
• Quantity: 5 g
• Beilstein: 3471575
• Synonym: p-naphtholbenzein, 1-naphtholbenzein, alpha-naphtholbenzein, .alpha.-naphtholbenzein, 4-4-hydroxynaphthyl phenylmethylene naphthalen-1-one, naphtholbenzein, 1 4h-naphthalenone, 4-4-hydroxy-1-naphthalenyl phenylmethylene, 1 4h-naphthalenone,4-4-hydroxy-1-naphthalenyl phenylmethylene, 1 4h-naphthalenone, 4-.alpha.-4-hydroxy-1-naphthyl benzylidene
• Solubility Information: Soluble in ethanol,acetic acid and acetone. Insoluble in water.
• Formula Weight: 374.44
• Chemical Name or Material: alpha-Naphtholbenzein

Safety and Handling

Hazard Category	H315-H319-H335
Hazard Statement	GHS H Statement H315-H319-H335 Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.
Precautionary Statement	P261-P264b-P271-P280-P302+P352-P304+P340-P305+P351+P338-P312-P332+P313-P362-P501c
EINECSNumber	205-656-3
TSCA	Yes
Recommended Storage	Ambient temperatures

SDS

RUO – Research Use Only