Description

2-(4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl)Benzene-1,4-Disulphonic Acid is a specialized organic intermediate featuring a pyrazolone core linked to a disulfonated benzene ring, which imparts significant water solubility and reactivity. This compound matters for its role as a versatile building block in the synthesis of high-value functional dyes, pigments, and optical brighteners. Industries such as textile manufacturing, specialty chemicals, and advanced material research require this intermediate for developing products with enhanced color fastness, brightness, and specific chromophoric properties.

Application

• Dye and Pigment Intermediate: A key precursor in the synthesis of reactive dyes, acid dyes, and azo pigments for textiles, leather, and paper.
• Optical Brightening Agent (OBA) Synthesis: Used in the manufacturing of stilbene-based fluorescent whitening agents for detergents and paper.
• Chemical Research & Development: Serves as a valuable building block for novel chromophores and functional materials in R&D laboratories.
• Specialty Chemical Manufacturing: Employed in the production of performance chemicals where sulfonic acid groups are needed for solubility or ionic character.
• Photographic Industry: Can be utilized in the synthesis of certain color couplers and sensitizing dyes.

Basic Information

Product Name	2-(4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl)Benzene-1,4-Disulphonic Acid
CAS No.	54817-63-9
Molecular Formula	C10H10N2O7S2
Molecular Weight	334.33 g/mol
Synonyms	1,4-Benzenedisulfonic acid, 2-(4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)-; 2-(4,5-Dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)-1,4-benzenedisulfonic acid; 3-Methyl-1-(2,5-disulfophenyl)-2-pyrazolin-5-one; 1-(2,5-Disulfophenyl)-3-methyl-5-pyrazolone; Pyrazolone Disulfonic Acid Derivative; Contact for details on additional trade names.
EINECS	Contact for details

Quality Control

Our 2-(4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl)Benzene-1,4-Disulphonic Acid is produced under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure high purity, consistent composition, and reliable performance for your synthesis processes. Certificates of Analysis (COA) detailing purity, assay, and impurity profiles are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive). Keep the container tightly sealed to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Off-white to light yellow powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
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.