Description

4-[[3-[[4-[[[3-Carboxy-4,5-dihydro-1-(3-nitrophenyl)-5-oxo-1H-pyrazol]-4-yl]azo]benzoyl]amino]phenyl]azo]-4,5-dihydro-1-(3-nitrophenyl)-5-oxo-1H-pyrazole-3-carboxylic acid disodium salt is a high-purity, symmetrical bis-azo pyrazolone dye intermediate. This compound is valued for its ability to impart vivid and stable coloration, particularly in the yellow to orange spectrum, due to its complex chromophoric structure. It is primarily utilized by manufacturers of advanced pigments, dyes, and specialty colorants for demanding industrial applications.

Application

• High-Performance Pigments: A critical intermediate for synthesizing organic pigments with excellent lightfastness and thermal stability, used in automotive coatings, industrial paints, and plastics.
• Specialty Dyes: Serves as a key building block for producing azo dyes applied in textiles, inks, and leather, offering strong color strength.
• Functional Colorants: Used in the development of colorants for non-traditional applications such as charge-generating materials in photocopiers and laser printers.
• Research & Development: An important compound for academic and industrial R&D focused on novel chromophores, dye-sensitized solar cells (DSSCs), and photochemical studies.
• Fine Chemical Synthesis: Employed as a sophisticated intermediate in the multi-step synthesis of complex, high-value specialty chemicals.

Basic Information

Item	Details
Product Name	4-[[3-[[4-[[[3-Carboxy-4,5-dihydro-1-(3-nitrophenyl)-5-oxo-1H-pyrazol]-4-yl]azo]benzoyl]amino]phenyl]azo]-4,5-dihydro-1-(3-nitrophenyl)-5-oxo-1H-pyrazole-3-carboxylic acid disodium salt
CAS No.	71550-27-1
Molecular Formula	C40H24N10Na2O12
Molecular Weight	858.66 g/mol
Synonyms	Bis(3-carboxy-1-(3-nitrophenyl)-5-oxo-4,5-dihydro-1H-pyrazol-4-yl) disodium salt; Symmetrical bis-azo pyrazolone dye; CI Pigment Yellow (related derivatives); 1,1'-(4,4'-Diazenediylbis(4,1-phenylene))bis(3-carboxy-1-(3-nitrophenyl)-5-oxo-4,5-dihydro-1H-pyrazole-4-carboxylic acid) disodium salt; Azo pyrazolone disodium salt; Disodium 4,4'-(4,4'-diaminodiphenyl)bis(diazenyl)bis(3-carboxy-1-(3-nitrophenyl)-5-oxo-4,5-dihydro-1H-pyrazole-4-carboxylate)
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and high purity. Quality is verified through comprehensive analytical techniques including HPLC, FT-IR, and elemental analysis. A Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment to support your quality assurance and regulatory needs.

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). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to prevent moisture absorption, which can affect product performance and handling.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to reference spectrum
Purity (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residual Solvents (GC)	Meets ICH guidelines

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