Thermo Scientific Chemicals α-Naphtholphthalein, pure, indicator

Description

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

Indicator

Specifications

Chemical Identifiers

• CAS: 596-01-0
• Molecular Formula: C28H18O4
• Molecular Weight (g/mol): 418.448
• MDL Number: MFCD00036202
• InChI Key: HQHBAGKIEAOSNM-UHFFFAOYSA-N
• PubChem CID: 68993
• IUPAC Name: 3,3-bis(4-hydroxynaphthalen-1-yl)-2-benzofuran-1-one
• SMILES: C1=CC=C2C(=C1)C(=CC=C2O)C3(C4=CC=CC=C4C(=O)O3)C5=CC=C(C6=CC=CC=C65)O

• Absorbance: 550 min. (at lamda max)
• Melting Point: 240.0°C to 250.0°C
• Beilstein: 18, I, 384
• Merck Index: 15, 6474
• Infrared Spectrum: Authentic
• Lambda Max: 648 to 654nm (in 0.1N NaOH)
• Formula Weight: 418.45
• Loss on Drying: 5% max. (110°C, 1 hr.)
• Grade: Pure
• Packaging: Glass bottle
• Visual Transition Interval: from pH 7.3 (pinkish-yellow) to pH 8.7 (greenish--blue)
• Color: Beige to Pink or Brown
• Quantity: 25 g
• Physical Form: Powder
• Chemical Name or Material: α-Naphtholphthalein

RUO – Research Use Only