Description

2-[[4-[[2-Amino-4-[[4,5-Dihydro-3-Methyl-5-Oxo-1-(4-Sulphophenyl)-1H-Pyrazol-4-Yl]Azo]-5-Nitrophenyl]Azo]Phenyl]Amino]-5-Nitrobenzenesulphonic Acid is a high-purity, complex azo dye intermediate essential for producing vibrant and stable colorants. Its sophisticated molecular structure provides excellent chromophoric properties, making it a critical component for achieving specific, high-performance hues. This compound is primarily required by manufacturers in the dyes and pigments industry, as well as researchers developing advanced colorimetric sensors and analytical reagents.

Application

• Primary Intermediate for Azo Dyes: A key building block in the synthesis of high-value, complex azo dyes for textiles, leather, and paper.
• Specialty Pigment Production: Used in the manufacture of pigments for inks, coatings, and plastics requiring specific color strength and lightfastness.
• Research & Development: Serves as a precise chemical reagent in academic and industrial R&D for developing new colorants and functional materials.
• Analytical Chemistry: Can be utilized as a standard or a reagent in colorimetric analysis and detection methods.
• Functional Dye Synthesis: A precursor for dyes used in non-textile applications, such as in optical data storage or laser dyes.

Basic Information

Product Name	2-[[4-[[2-Amino-4-[[4,5-Dihydro-3-Methyl-5-Oxo-1-(4-Sulphophenyl)-1H-Pyrazol-4-Yl]Azo]-5-Nitrophenyl]Azo]Phenyl]Amino]-5-Nitrobenzenesulphonic Acid
CAS No.	85959-26-8
Molecular Formula	C28H22N10O11S2
Molecular Weight	738.66 g/mol
Synonyms	Acid Red 337; C.I. 17200; 2-[[4-[[2-Amino-4-[(4,5-dihydro-3-methyl-5-oxo-1-(4-sulfophenyl)-1H-pyrazol-4-yl)azo]-5-nitrophenyl]azo]phenyl]amino]-5-nitrobenzenesulfonic acid; Benzenesulfonic acid, 2-[[4-[[2-amino-4-[[4,5-dihydro-3-methyl-5-oxo-1-(4-sulfophenyl)-1H-pyrazol-4-yl]azo]-5-nitrophenyl]azo]phenyl]amino]-5-nitro-; 5-Nitro-2-[[4-[[2-amino-4-[(4,5-dihydro-3-methyl-5-oxo-1-(4-sulfophenyl)-1H-pyrazol-4-yl)azo]-5-nitrophenyl]azo]phenyl]amino]benzenesulfonic acid
EINECS	Contact for details

Quality Control

Our production of 2-[[4-[[2-Amino-4-[[4,5-Dihydro-3-Methyl-5-Oxo-1-(4-Sulphophenyl)-1H-Pyrazol-4-Yl]Azo]-5-Nitrophenyl]Azo]Phenyl]Amino]-5-Nitrobenzenesulphonic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and consistent performance in downstream synthesis. Certificates of Analysis (COA) documenting all critical parameters are available upon request.

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 (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Dark red to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0% (Typical 97-99%)
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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