Description

4-Chlorobenzene-1,2-Diol is a chlorinated dihydroxybenzene derivative, a key organic intermediate with significant synthetic utility. Its value lies in its versatile phenolic structure, which serves as a crucial building block for the synthesis of more complex molecules in fine chemical and pharmaceutical manufacturing. This compound is primarily needed by R&D chemists and process engineers in the agrochemical, pharmaceutical, and specialty chemical industries for developing active ingredients and functional materials.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of various active pharmaceutical ingredients (APIs), particularly those with chlorinated phenolic backbones.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and pesticides, where the chlorocatechol moiety imparts specific biological activity.
• Polymer & Resin Modifier: Acts as a monomer or additive to introduce chlorine and hydroxyl functionality into polymer chains, enhancing properties like flame retardancy or adhesion.
• Dye & Pigment Manufacturing: Serves as an intermediate for synthesizing complex organic dyes and pigments, contributing to color fastness and molecular stability.
• Research & Development: A valuable reagent in organic chemistry research for constructing complex molecular architectures and studying reaction mechanisms.
• Specialty Chemical Production: Employed in the manufacture of antioxidants, UV stabilizers, and other performance chemicals where its phenolic structure is beneficial.

Basic Information

Product Name	4-Chlorobenzene-1,2-Diol
CAS No.	2138-22-9
Molecular Formula	C6H5ClO2
Molecular Weight	144.56 g/mol
Synonyms	4-Chlorocatechol; 4-Chloro-1,2-benzenediol; 4-Chloropyrocatechol; 1,2-Dihydroxy-4-chlorobenzene; 4-Chloro-1,2-dihydroxybenzene; 4-Chlorobenzene-1,2-diol; 4-Chloropyrocatechin; 4-Cl-CAT
EINECS	218-378-9

Quality Control

Our 4-Chlorobenzene-1,2-Diol is produced under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets the high standards required for synthetic applications. Certificates of Analysis (COA) detailing all specifications are provided with every shipment and are available upon request.

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 such as strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	82 - 86 °C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%

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