N8257

α-Naphtholphthalein

practical grade

• Synonym(s): 1-Naphtholphthalein; 3,3-Bis(4-hydroxynaphthalen-1-yl)isobenzofuran-1(3H)-one
• Empirical Formula (Hill Notation): C₂₈H₁₈O₄
• CAS Number: 596-01-0
• Molecular Weight: 418.44
• Beilstein: 97816
• EC Number: 209-875-5
• MDL number: MFCD00036202
• UNSPSC Code: 12171500
• PubChem Substance ID: 24897859
• NACRES: NA.47

Properties

• grade: practical grade
• Quality Level: 200
• Assay: >80% NaOH basis (titration)
• form: powder
• pH: 7.3-8.7, colorless to blue-green
• mp: 238-240 °C (lit.)
• solubility: ethanol: 50 mg/mL, clear, red-orange
• application(s): diagnostic assay manufacturing; hematology; histology
• storage temp.: room temp
• SMILES string: Oc1ccc(c2ccccc12)C3(OC(=O)c4ccccc34)c5ccc(O)c6ccccc56
• InChI: 1S/C28H18O4/c29-25-15-13-23(17-7-1-3-9-19(17)25)28(22-12-6-5-11-21(22)27(31)32-28)24-14-16-26(30)20-10-4-2-8-18(20)24/h1-16,29-30H
• InChI key: HQHBAGKIEAOSNM-UHFFFAOYSA-N

Description

General description

α-Naphtholphthalein, a phthalein dye is a pH indicator between 7.3 (colorless) and 8.7 (greenish-blue). Applications include inks, markers, detecting viable cells, food storage, and many more.

Safety Information

• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves