Description

Benzenesulfonic Acid, 4,4'-[Methylenebis[4,1-Phenyleneazo( 4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazole -4,1-Diyl)]]Bis[3-Methyl-, Disodium Salt is a high-purity, synthetic organic dye intermediate belonging to the class of azo pyrazolone compounds. Its complex molecular structure is engineered to provide excellent chromophoric properties and thermal stability, making it a critical component in the production of high-performance pigments and dyes. This chemical is primarily sought by manufacturers in the specialty chemicals, advanced pigments, and industrial colorants sectors who require consistent quality and reliable supply for their formulations.

Application

• Primary Intermediate for High-Performance Pigments: A key precursor in the synthesis of organic pigments, particularly yellows and oranges, used in plastics, coatings, and inks.
• Specialty Dye Manufacturing: Used in the production of dyes for technical textiles, automotive finishes, and other applications requiring superior lightfastness and weather resistance.
• Functional Colorants: Potential use in the development of colorants for non-traditional applications, including security inks and functional polymer systems.
• Research & Development: Serves as a valuable building block in chemical R&D for creating novel chromophores and studying structure-property relationships in dye chemistry.

Basic Information

Product Name	Benzenesulfonic Acid, 4,4'-[Methylenebis[4,1-Phenyleneazo( 4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazole -4,1-Diyl)]]Bis[3-Methyl-, Disodium Salt
CAS No.	75949-73-4
Molecular Formula	C34H26N8Na2O8S2
Molecular Weight	776.71 g/mol
Synonyms	Disodium 4,4'-[Methylenebis(4,1-phenyleneazo)]bis[5-methyl-2-(4-sulfonatophenyl)-2,4-dihydro-3H-pyrazol-3-one]; C.I. Pigment Yellow 180; PY 180; 4,4'-[Methylenebis(4,1-phenyleneazo)]bis[5-methyl-2-(4-sulfonatophenyl)-2,4-dihydro-3H-pyrazol-3-one] disodium salt; Benzenesulfonic acid, 4,4'-[methylenebis[4,1-phenyleneazo(4,5-dihydro-3-methyl-5-oxo-1H-pyrazole-4,1-diyl)]]bis[3-methyl-, sodium salt (1:2)
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and purity. Each lot is analyzed against stringent in-house specifications using advanced analytical techniques such as HPLC and spectrophotometry. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every shipment to support your quality assurance and regulatory compliance needs.

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). This material is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Yellow to Orange Powder
Identification (IR)	Conforms to Standard
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Solubility	Soluble in Water

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