Description

3,3'-Dichlorobenzidine is an important aromatic diamine and a key chemical intermediate in organic synthesis. Its primary commercial value lies in its role as a precursor for the production of high-performance pigments and dyes, offering excellent color fastness and thermal stability. This compound is essential for manufacturers in the pigment, polymer, and specialty chemical industries seeking to produce azo pigments for inks, plastics, and coatings.

Application

• Primary Intermediate for Azo Pigments: Serves as the diazo component in the synthesis of diarylide yellows and oranges, which are widely used in printing inks, plastics, and textiles.
• Polymer Industry: Used in the production of polyurethane and polyimide resins, where it can act as a chain extender or curing agent, contributing to material strength and thermal properties.
• Dye Manufacturing: A crucial building block for creating specific direct and solvent dyes with enhanced performance characteristics.
• Research & Development: Employed in organic synthesis laboratories for the development of novel chemical entities, liquid crystals, and pharmaceutical intermediates.
• Cross-linking Agent: Functions as a cross-linker in epoxy resin systems and other thermosetting polymers to improve mechanical and chemical resistance.

Basic Information

Product Name	3,3'-Dichlorobenzidine
CAS No.	91-94-1
Molecular Formula	C12H10Cl2N2
Molecular Weight	253.13 g/mol
Synonyms	DCB; 3,3'-Dichloro-4,4'-diaminobiphenyl; 3,3'-Dichlorobiphenyl-4,4'-diamine; 4,4'-Diamino-3,3'-dichlorobiphenyl; o,o'-Dichlorobenzidine; Benzidine, 3,3'-dichloro-; C.I. 37230
EINECS	202-109-0

Quality Control

Our 3,3'-Dichlorobenzidine is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including assay, impurity profile, and physical characterization, to ensure it meets precise customer specifications and industry standards. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee traceability and product integrity.

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 heat, open flames, and incompatible materials such as strong oxidizing agents. Due to its light-sensitive nature, containers should be kept in opaque packaging or amber glass.

Specification

Item	Specification
Appearance	Light gray to brown crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Melting Point	132 - 136 °C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 20 ppm

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