Description

1-(3-Aminophenyl)-4-[[3-[[4-[[[1-(3-aminophenyl)-3-carboxy-4,5-dihydro-5-oxo-1H-pyrazol]-4-yl]azo]benzoyl]amino]phenyl]azo]-4,5-dihydro-5-oxo-1H-pyrazole-3-carboxylic acid disodium salt is a high-purity, water-soluble disazo pyrazolone dye intermediate. This compound is valued for its ability to impart vibrant, lightfast colors and its role as a key precursor in synthesizing specialized dyes and pigments. It is primarily sought by manufacturers in the textile, ink, and specialty coatings industries for producing high-performance colorants.

Application

• Textile Dyeing: As a critical intermediate for synthesizing reactive and direct dyes for cotton, wool, and synthetic fibers.
• Ink Manufacturing: Used in the production of high-quality pigments for printing inks, including inks for packaging and security applications.
• Industrial Coatings: Serves as a precursor for pigments used in automotive, architectural, and industrial paints requiring excellent color strength and durability.
• Plastics and Polymers: Employed in the coloration of engineering plastics and synthetic polymers.
• Research & Development: Utilized in chemical research for developing novel chromophores and studying azo dye chemistry.
• Specialty Colorants: A key building block for creating custom, high-value dyes for niche applications like cosmetics or food contact materials (subject to compliance).

Basic Information

Product Name	1-(3-Aminophenyl)-4-[[3-[[4-[[[1-(3-aminophenyl)-3-carboxy-4,5-dihydro-5-oxo-1H-pyrazol]-4-yl]azo]benzoyl]amino]phenyl]azo]-4,5-dihydro-5-oxo-1H-pyrazole-3-carboxylic acid disodium salt
CAS No.	71550-29-3
Molecular Formula	C32H22N10O8Na2
Molecular Weight	720.57 g/mol
Synonyms	Disodium 1,1'-(carbonyldi-4,1-phenylene)bis[1-(3-aminophenyl)-5-oxo-4,5-dihydro-1H-pyrazole-4-carboxylate]; Disazo pyrazolone dye intermediate; CI 18960 (related); Acid Yellow 219 (related); Pyrazolone disazo dye; 4,4'-Carbonylbis[1-(3-aminophenyl)-5-oxo-4,5-dihydro-1H-pyrazole-4-carboxylic acid] disodium salt
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot is analyzed using advanced techniques like HPLC to confirm identity and assay. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications is provided with every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Orange to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (1% in Water)	Clear solution

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