Description

p-Naphtholbenzein is a high-purity organic compound widely used as a pH indicator and a versatile chemical intermediate. Its distinct color change properties make it a critical component for precise analytical and laboratory applications. This product is essential for manufacturers and research facilities in the chemical synthesis, analytical reagent, and specialty dye sectors seeking reliable quality and consistent performance.

Application

• pH Indicator: Used in titrations and analytical chemistry for its clear visual endpoint across specific pH ranges.
• Chemical Synthesis: Serves as a key intermediate in the production of more complex organic compounds and dyes.
• Laboratory Reagent: Employed in various qualitative and quantitative analytical procedures in research and quality control labs.
• Educational Demonstrations: Utilized in academic settings to teach acid-base chemistry and indicator theory.
• Specialty Dye Precursor: Acts as a starting material for synthesizing specific colorants and stains.

Basic Information

Product Name	p-Naphtholbenzein
CAS No.	145-50-6
Molecular Formula	C27H20O3
Molecular Weight	392.45 g/mol
Synonyms	4-[α-(4-Hydroxyphenyl)benzyl]-1-naphthol; p-Naphtholbenzene; Naphtholbenzein; 1-Naphthol-4-[phenyl(4-hydroxyphenyl)methyl]; CI 45510; Benzein, p-naphthol-; Benzein, 4'-[α-(4-hydroxyphenyl)benzyl]-1-naphthol
EINECS	205-653-8

Quality Control

Our p-Naphtholbenzein is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure it meets high-purity standards suitable for laboratory and industrial use. A Certificate of Analysis (COA) detailing purity, identity, and other critical parameters is provided with each shipment to guarantee traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from incompatible materials and sources of ignition.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Melting Point	Contact for details
pH Transition Range	Contact for details

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.