Description

5-Amino-2-[2-[4-(4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl)-2-Sulphophenyl]Vinyl]Benzenesulphonic Acid is a specialized organic intermediate featuring a complex structure with dual sulfonic acid groups and a pyrazolone moiety, making it a valuable functional building block. Its primary commercial value lies in its role as a key precursor in the synthesis of high-performance dyes and pigments, particularly for applications requiring specific light-fastness and color properties. This compound is essential for manufacturers in the textile dyeing, ink formulation, and specialty chemical synthesis industries seeking to develop advanced colorants.

Application

• Dye and Pigment Intermediate: A critical precursor for synthesizing reactive dyes, acid dyes, and azo pigments used in textile coloring.
• Textile Industry: Used in the production of dyes for dyeing and printing natural and synthetic fibers like wool, silk, and nylon.
• Ink Manufacturing: Serves as a key component in formulating specialty inks for packaging, security printing, and digital applications.
• Liquid Crystal Display (LCD) Color Filters: Potential use in the synthesis of colorants for high-definition display technologies.
• Research & Development: Employed in organic synthesis laboratories for developing novel chromophores and functional materials.
• Analytical Reagents: Can be used as a starting material for synthesizing complexometric indicators or other analytical chemicals.

Basic Information

Item	Details
Product Name	5-Amino-2-[2-[4-(4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl)-2-Sulphophenyl]Vinyl]Benzenesulphonic Acid
CAS No.	119-74-4
Molecular Formula	C18H17N3O7S2
Molecular Weight	451.47 g/mol
Synonyms	5-Amino-2-[2-[4-(4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)-2-sulfophenyl]ethenyl]benzenesulfonic acid; 1,1'-(1,2-Ethenediyl)bis[4-(4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)-2-benzenesulfonic acid], 5-amino derivative; Benzenesulfonic acid, 5-amino-2-[2-[4-(4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)-2-sulfophenyl]ethenyl]-; CI 17915; Acid Yellow 61 (precursor); Light Yellow 3G (related dye intermediate).
EINECS	204-350-5

Quality Control

Our production of 5-Amino-2-[2-[4-(4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl)-2-Sulphophenyl]Vinyl]Benzenesulphonic Acid adheres to a stringent quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and consistent performance in downstream synthesis. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical characteristics is provided with each shipment.

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). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture, which can affect stability and handling properties.

Specification

Item	Specification
Appearance	Yellow to brownish-yellow powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.5%
Solubility	Soluble in water, alkaline solutions; slightly soluble in most organic solvents

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