Description

2,2'-[(3,3'-Dichloro[1,1'-Biphenyl]-4,4'-Diyl)Bis(Azo)]Bis[n-(2-Ethoxyphenyl)-3-Oxobutyramide] is a high-purity, specialized organic pigment and dye intermediate of significant commercial importance. Its complex molecular structure, featuring a biphenyl core with azo linkages and amide groups, provides excellent colorant properties and chemical stability for demanding applications. This compound is essential for manufacturers in the pigments, plastics, and advanced materials sectors seeking to produce vivid, durable colors and functional additives. The CAS number for this product is 31775-17-4.

Application

• High-Performance Pigments: Primary use as a key intermediate in the synthesis of high-grade organic pigments, particularly for producing yellows, oranges, and reds with excellent lightfastness and heat stability.
• Plastics and Polymer Coloring: Imparts stable coloration to engineering plastics, PVC, polyolefins, and synthetic fibers during masterbatch production.
• Industrial Coatings and Inks: Used in the formulation of specialty industrial coatings, automotive paints, and printing inks requiring resistance to weathering and chemicals.
• Functional Dyes: Serves as a precursor for dyes used in non-textile applications such as lasers, optical data storage, and liquid crystal displays (LCDs).
• Research & Development: A valuable building block in academic and industrial R&D for developing novel chromophores, sensors, and advanced organic materials.

Basic Information

Product Name	2,2'-[(3,3'-Dichloro[1,1'-Biphenyl]-4,4'-Diyl)Bis(Azo)]Bis[n-(2-Ethoxyphenyl)-3-Oxobutyramide]
CAS No.	31775-17-4
Molecular Formula	C44H38Cl2N6O6
Molecular Weight	817.73 g/mol
Synonyms	Pigment Yellow 155; C.I. 200310; 3,3'-Dichloro-4,4'-bis[2-(2-ethoxyphenylcarbamoyl)-3-oxobutylazo]biphenyl; 2,2'-[(3,3'-Dichloro-4,4'-biphenylylene)bis(azo)]bis[N-(2-ethoxyphenyl)-3-oxobutyramide]; 2,2'-[(3,3'-Dichloro[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[N-(2-ethoxyphenyl)-3-oxobutanamide]; Azo Pigment Yellow 155; C.I. Pigment Yellow 155; PY 155.
EINECS	Contact for details

Quality Control

Our production of 2,2'-[(3,3'-Dichloro[1,1'-Biphenyl]-4,4'-Diyl)Bis(Azo)]Bis[n-(2-Ethoxyphenyl)-3-Oxobutyramide] adheres to stringent quality management systems to ensure batch-to-batch consistency and purity for industrial applications. Each lot undergoes comprehensive analysis including HPLC assay, spectral identification (IR/UV-Vis), and impurity profiling to meet precise customer specifications. Certificates of Analysis (COA) documenting all critical quality attributes are provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). Keep away from heat, sparks, and open flame. Due to its light-sensitive nature, containers should be opaque or stored in darkness.

Specification

Item	Specification
Appearance	Yellow to Orange Powder
Identification (IR)	Conforms to Reference Spectrum
Assay (HPLC)	≥ 97.0%
Loss on Drying	≤ 1.0%
Residue on Ignition (Sulfated Ash)	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total Impurities ≤ 3.0% Any Single Impurity ≤ 1.0%
Particle Size (D50)	Contact for details

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