Description

3-(3-Methyl-5-Oxo-2H-Pyrazol-1(5H)-Yl)Naphthalene-1,5-Disulfonic Acid is a specialized organic intermediate featuring a naphthalene disulfonic acid core linked to a pyrazolone moiety. This compound matters for its role as a key building block in the synthesis of high-value, functional dyes and pigments, particularly azo dyes, where it contributes to color fastness and specific spectral properties. Industries that require it include manufacturers of textile dyes, inkjet inks, and advanced materials research focused on colorants and functional polymers.

Application

• Primary Intermediate for Azo Dyes: Serves as a critical diazo component or coupling agent in the production of acid dyes and reactive dyes for textiles like wool, silk, and nylon.
• Specialty Pigment Synthesis: Used in the manufacture of high-performance organic pigments for inks, coatings, and plastics, offering enhanced brightness and stability.
• Functional Dye Development: A valuable precursor in research and development of dyes for non-textile applications, including sensitizers for solar cells or laser dyes.
• Chemical Research & Synthesis: Employed in organic synthesis as a building block to create more complex sulfonated aromatic compounds with specific electronic or ionic properties.
• Analytical Reagent Potential: May be utilized in the formulation of specialized reagents or indicators in analytical chemistry due to its chromophoric system.

Basic Information

Item	Detail
Product Name	3-(3-Methyl-5-Oxo-2H-Pyrazol-1(5H)-Yl)Naphthalene-1,5-Disulfonic Acid
CAS No.	6838-01-3
Molecular Formula	C₁₄H₁₂N₂O₇S₂
Molecular Weight	384.38 g/mol
Synonyms	1,5-Naphthalenedisulfonic acid, 3-(3-methyl-5-oxo-1H-pyrazol-1-yl)-; 3-(3-Methyl-5-oxo-1H-pyrazol-1-yl)naphthalene-1,5-disulfonic acid; Naphthalene-1,5-disulfonic acid, 3-(3-methyl-5-oxo-2H-pyrazol-1-yl)-; 3-(3-Methyl-5-oxo-2H-pyrazol-1-yl)-1,5-naphthalenedisulfonic acid; 6838-01-3; Pyrazolone naphthalene disulfonate intermediate; Azo dye intermediate BA (or similar trade names may exist).
EINECS	Contact for details

Quality Control

Our production of 3-(3-Methyl-5-Oxo-2H-Pyrazol-1(5H)-Yl)Naphthalene-1,5-Disulfonic Acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and purity suitable for industrial synthesis. Products undergo rigorous quality testing, including chromatographic purity assays and identity confirmation, to ensure compliance with agreed specifications. Certificates of Analysis (COA) documenting key parameters are available upon request for every batch shipped.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (typically 15-25°C). Keep away from strong acids and organic solvents. The container should be kept 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	≤ 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.