Thermo Fisher, A16125.22, alpha-Naphtholbenzein, Thermo Scientific Chemicals

Quantity: 100 g 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.
CAS: 145-50-6
IUPAC Name: (4E)-4-[(4-hydroxynaphthalen-1-yl)(phenyl)methylidene]-1,4-dihydronaphthalen-1-one
Molecular Formula: C27H18O2
InChI Key: VDDWRTZCUJCDJM-SOYKGTTHSA-N
SMILES: OC1=C2C=CC=CC2=C(C=C1)C(\C1=CC=CC=C1)=C1/C=CC(=O)C2=CC=CC=C12
Form: Powder
Color Change: Orange @ pH8.
2 to blue-green @ pH10.
0
Specific Absorbance (E 1%/1cm): ≥350
Comment: Suitable for use as an indicator
lambda-max (UV-Vis): 644-652nm (0.
01M NaOH)