Description

3-[[4,5-Dihydro-3-Methyl-5-Oxo-1-(4-Sulphophenyl)-1H-Pyrazol-4-Yl]Azo]Naphthalene-1,5-Disulphonic Acid is a high-purity, water-soluble azo dye intermediate essential for producing vibrant and stable colorants. Its complex molecular structure, featuring multiple sulphonic acid groups, provides excellent solubility and binding affinity, making it a critical component for high-performance dyes. This compound is primarily sought after by manufacturers in the textile, ink, and specialty chemical industries for creating a range of vivid colors with superior fastness properties.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of reactive dyes for cotton, wool, and nylon, offering excellent wash and light fastness.
• Textile Colorant Production: Used in manufacturing acid dyes and direct dyes for coloring silk, paper, and leather.
• Inkjet and Printing Inks: Serves as a crucial pigment precursor for high-quality inks requiring precise color gamut and stability.
• Functional Dye Synthesis: Employed in research and production of dyes for specialized applications, including biological staining and analytical indicators.
• Industrial Pigment Manufacturing: Acts as an intermediate for lake pigments and other colorants used in plastics and coatings.

Basic Information

Product Name	3-[[4,5-Dihydro-3-Methyl-5-Oxo-1-(4-Sulphophenyl)-1H-Pyrazol-4-Yl]Azo]Naphthalene-1,5-Disulphonic Acid
CAS No.	84030-36-4
Molecular Formula	C20H16N4O10S3
Molecular Weight	568.55 g/mol
Synonyms	Acid Yellow 220 (C.I. 22010); 1,5-Naphthalenedisulfonic acid, 3-[(4,5-dihydro-3-methyl-5-oxo-1-(4-sulfophenyl)-1H-pyrazol-4-yl)azo]-; C.I. Acid Yellow 220; Acid Yellow 220; Yellow 220; 3-[(4,5-Dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-1,5-naphthalenedisulfonic acid (related structure); Azo dye intermediate 84030-36-4
EINECS	Contact for details

Quality Control

Our production of 3-[[4,5-Dihydro-3-Methyl-5-Oxo-1-(4-Sulphophenyl)-1H-Pyrazol-4-Yl]Azo]Naphthalene-1,5-Disulphonic Acid adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and compliance with industry specifications. Certificates of Analysis (COA) detailing purity, impurity profile, and physical characteristics are available upon request 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 (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	Yellow to Orange Powder
Identification (IR)	Conforms to Structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Freely Soluble

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