Description

2-[[1-(2,5-Dichloro-4-Sulphophenyl)-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-4-Yl]Azo]Naphthalene-1-Sulphonic Acid, Sodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. This compound is valued for its role in synthesizing vibrant and stable colorants, particularly in the production of reactive and acid dyes. It is primarily required by manufacturers in the textile, ink, and specialty chemical industries seeking consistent quality for their color formulation processes.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-performance reactive dyes used for coloring cotton, viscose, and other cellulosic fibers.
• Acid Dye Production: Utilized in the manufacture of acid dyes for wool, silk, and nylon, providing excellent wash and light fastness.
• Specialty Ink Formulations: Serves as a crucial component in creating pigments and dyes for high-quality inks used in packaging and security printing.
• Paper Coloring: Employed in the production of dyes for specialty paper products requiring specific color properties.
• Research & Development: Used in chemical R&D laboratories for developing novel chromophores and studying azo dye chemistry.
• Industrial Colorant Synthesis: Acts as a precursor for various industrial colorants used in plastics and coatings.

Basic Information

Product Name	2-[[1-(2,5-Dichloro-4-Sulphophenyl)-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-4-Yl]Azo]Naphthalene-1-Sulphonic Acid, Sodium Salt
CAS No.	68966-45-0
Molecular Formula	C20H12Cl2N4Na2O7S2
Molecular Weight	613.35 g/mol
Synonyms	Sodium 2-[(1-(2,5-dichloro-4-sulfophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl)diazenyl]naphthalene-1-sulfonate; 1,3-Naphthalenedisulfonic acid, 7-[[1-(2,5-dichloro-4-sulfophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl]azo]-, sodium salt (1:2); C.I. Reactive Orange 13 intermediate; Azo dye intermediate 68966-45-0; Pyrazolone-based azo dye salt; Dichloro sulfophenyl pyrazolone azo naphthalene sulfonate
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and high purity for optimal downstream performance. Quality is verified through advanced analytical techniques including HPLC, UV-Vis spectroscopy, and titration methods. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to support your quality assurance systems.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product performance and handling.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Purity (HPLC Area %)	≥ 98.0%
Water Content (KF)	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear solution
pH (1% Solution)	6.0 - 8.0

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