Description

2,2',5,5'-Tetrachlorobenzidine is a chlorinated benzidine derivative, a key chemical intermediate in the synthesis of high-performance pigments and dyes. Its value lies in its ability to impart excellent lightfastness, thermal stability, and vivid color properties to the final products. This compound is essential for manufacturers in the pigment, dye, and specialty polymer industries seeking to produce durable colorants for plastics, inks, and coatings.

Application

• Primary intermediate for the synthesis of high-performance azo pigments, particularly diarylide yellows and oranges.
• Manufacture of specialized dyes for industrial applications requiring enhanced durability.
• Production of colorants for plastics and synthetic resins.
• Key component in pigments for printing inks, especially for packaging.
• Used in research and development of novel organic electronic materials.
• Potential intermediate in the synthesis of liquid crystal polymers and other advanced materials.

Basic Information

Product Name	2,2',5,5'-Tetrachlorobenzidine
CAS No.	15721-02-5
Molecular Formula	C12H8Cl4N2
Molecular Weight	322.02 g/mol
Synonyms	3,3',6,6'-Tetrachlorobenzidine; 3,3',6,6'-Tetrachloro-[1,1'-biphenyl]-4,4'-diamine; Benzidine, 2,2',5,5'-tetrachloro-; TCAB; 4,4'-Diamino-3,3',6,6'-tetrachlorobiphenyl
EINECS	239-819-7

Quality Control

Our 2,2',5,5'-Tetrachlorobenzidine is produced under stringent quality management systems to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including assay, impurity profiling, and identity confirmation. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials. Due to its light-sensitive and easily oxidized nature, it is recommended to store under an inert atmosphere (e.g., nitrogen) for long-term preservation. Keep container tightly sealed when not in use to minimize exposure to air and moisture.

Specification

Item	Specification
Appearance	Light gray to beige crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	188°C - 192°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.