CAS 145-50-6

α-Naphtholbenzein

Description:

α-Naphtholbenzein, with the CAS number 145-50-6, is an organic compound that belongs to the class of naphthol derivatives. It is characterized by its distinctive structure, which includes a naphthalene ring fused with a benzene ring and a hydroxyl group. This compound typically appears as a solid, often exhibiting a yellow to orange color, and is known for its use as a pH indicator due to its ability to change color in response to varying pH levels. α-Naphtholbenzein is soluble in organic solvents but has limited solubility in water. Its applications extend to analytical chemistry, where it is utilized in titrations and other methods to determine acidity or alkalinity. Additionally, it may be employed in dye formulations and as a reagent in organic synthesis. Safety precautions should be observed when handling this compound, as it may pose health risks upon exposure. Overall, α-Naphtholbenzein is a valuable chemical in both laboratory and industrial settings.

Formula: C₂₇H₁₈O₂

InChI: 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

InChI key: InChIKey=VDDWRTZCUJCDJM-UHFFFAOYSA-N

SMILES: C(C=1C2=C(C(O)=CC1)C=CC=C2)(=C3C=4C(C(=O)C=C3)=CC=CC4)C5=CC=CC=C5

Synonyms:

• (4E)-4-[(4-hydroxynaphthalen-1-yl)(phenyl)methylidene]naphthalen-1(4H)-one
• (4Z)-4-[(4-hydroxynaphthalen-1-yl)(phenyl)methylidene]naphthalen-1(4H)-one
• 1(4H)-Naphthalenone, 4-((4-hydroxy-1-naphthalenyl)phenylmethylene)-
• 1(4H)-Naphthalenone, 4-(alpha-(4-hydroxy-1-naphthyl)benzylidene)- (8CI)
• 1(4H)-Naphthalenone, 4-[α-(4-hydroxy-1-naphthyl)benzylidene]-
• 4,4'-[Hydroxy(Phenyl)Methanediyl]Dinaphthalen-1-Ol
• 4-(alpha-(4-Hydroxy-1-naphthyl)benzylidene)naphthalen-1(4H)-one
• 4-[(4-Hydroxy-1-naphthalenyl)phenylmethylene]-1(4H)-naphthalenone
• 4-[(4-hydroxynaphthalen-1-yl)(phenyl)methylidene]naphthalen-1(4H)-one
• Nsc 9862
• alpha-Naphtholbenzein
• p-Naphtholbenzein

p-Naphtholbenzein

CAS: 145-50-6

Formula: C₂₇H₁₈O₂

Color and Shape: Orange to Amber to Dark red powder to crystal

Molecular weight: 374.44

Ref: 3B-N0028

α-Naphtholbenzein

CAS: 145-50-6

-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 r

Formula: C₂₇H₁₈O₂

Color and Shape: Powder, Red to brown

Molecular weight: 374.44

Ref: 02-A16125

p-Naphtholbenzein

CAS: 145-50-6

Formula: C₂₇H₁₈O₂

Purity: 95%

Color and Shape: Solid

Molecular weight: 374.4306

Ref: IN-DA001KFL

α-Naphtholbenzein

CAS: 145-50-6

Formula: C₂₇H₁₈O₂

Color and Shape: Red to red-brown or dark brown powder

Molecular weight: 374.44

Ref: 7W-GT1431

α-Naphtholbenzein

CAS: 145-50-6

α-Naphtholbenzein, also known as p-Naphtolbenzein, is a dye that serves as a pH indicator, exhibiting a color change from yellow at a pH of 0-8.2 to turquoise

Formula: C₂₇H₁₈O₂

Color and Shape: Solid

Molecular weight: 374.43

Ref: TM-T80705

alfa-Naphtholbenzein

CAS: 145-50-6

Formula: C₂₇H₁₈O₂

Molecular weight: 374.44

Ref: 4Z-N-110011

α-Naphtholbenzein

CAS: 145-50-6

α-Naphtholbenzein

Formula: C₂₇H₁₈O₂

Purity: ≥95%

Color and Shape: dark red powder

Molecular weight: 374.43g/mol

Ref: 54-OR70081

Alpha-Naphtholbenzein (Technical Grade)

CAS: 145-50-6

Applications alpha-Naphtholbenzein is a pH indicator (pH 0.0-0.8/ pH 8.2-10.0). Dyes and metabolites.

Formula: C₂₇H₁₈O₂

Color and Shape: Dark Red

Molecular weight: 374.43

Ref: TR-N369005

p-Naphtholbenzein

CAS: 145-50-6

p-Naphtholbenzein is a fluorescent dye that is used in the diagnosis of human pathogens. It can be used to detect the presence of fatty acids, which are found on the surface of bacteria and in the cell wall. p-Naphtholbenzein elutes from an agar plate at pH 6.0 and can be detected using a spectrophotometer. The fluorescence of p-naphtholbenzein is absorbed by fatty acids, which emit light when excited by ultraviolet light. This makes it useful for detecting fatty acid content in cells, organisms, and surfaces. It is also used as an excipient in subclinical mastitis treatments to help reduce inflammation and improve milk production. In biodiesel reactions, p-naphtholbenzein acts as an optimal reaction catalyst because it stabilizes hydroxybenzoic acid (HBA) with benzalkonium chloride (BZK).

Formula: C₂₇H₁₈O₂

Color and Shape: Powder

Molecular weight: 374.43 g/mol

Ref: 3D-FN32370

1-Naphtholbenzein extrapure

CAS: 145-50-6

Color and Shape: Dark red to red-brown to brown black to orange-brown, Powder, Clear

Ref: SR-77807

Naphtholbenzein

CAS: 145-50-6

Formula: C₂₇H₁₈O₂

Color and Shape: Solid

Molecular weight: 374.439

Ref: 10-F493835