Description

2-[4-[[4-[[4-[(4-Amino-o-Tolyl)Azo]Benzoyl]Amino]-3-Sulphophenyl]Azo]-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl]Benzene-1,4-Disulphonic Acid is a high-purity, complex azo dye intermediate characterized by its multiple sulphonic acid groups, which impart excellent water solubility. This compound is critical for synthesizing high-value, colorfast dyes and pigments, particularly in applications demanding specific hue and stability. It is primarily utilized by manufacturers in the textile, ink, and specialty chemical industries seeking to produce vibrant and durable colors.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-performance reactive dyes for cotton and other cellulosic fibers.
• Specialty Pigment Manufacturing: Used in the production of organic pigments for inks, coatings, and plastics requiring specific color properties and lightfastness.
• Textile Dyeing: Serves as a crucial precursor for dyes used in the textile industry to achieve bright, wash-fast shades.
• Functional Dye Synthesis: Employed in research and development of functional dyes for non-textile applications, such as in sensors or imaging technologies.
• Laboratory Reagent: Used as a standard or intermediate in chemical research and analytical method development.

Basic Information

Product Name	2-[4-[[4-[[4-[(4-Amino-o-Tolyl)Azo]Benzoyl]Amino]-3-Sulphophenyl]Azo]-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl]Benzene-1,4-Disulphonic Acid
CAS No.	94200-34-7
Molecular Formula	C31H25N7O10S3
Molecular Weight	751.76 g/mol
Synonyms	Acid Yellow 219 (C.I. 13951); 2-[4-[[4-[[4-[(4-Amino-2-methylphenyl)azo]benzoyl]amino]-3-sulfophenyl]azo]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl]-1,4-benzenedisulfonic acid; Benzenesulfonic acid, 2-[4-[[4-[[4-[(4-amino-2-methylphenyl)azo]benzoyl]amino]-3-sulfophenyl]azo]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl]-1,4-disulfo-; C.I. Acid Yellow 219; Azo dye intermediate 94200-34-7; Reactive yellow dye intermediate
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and high purity. Quality is verified through modern analytical techniques including HPLC, UV-Vis spectroscopy, and titration methods. A comprehensive 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). Keep away from strong oxidizing agents and incompatible materials. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided.

Specification

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

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