Description

2-[[1-(6-Chloro-o-Tolyl)-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-4-Yl]Azo]Naphthalene-1-Sulphonic Acid CAS NO 70833-47-5 is a high-purity, complex azo dye intermediate characterized by its specific molecular structure. This compound is critical for synthesizing high-performance pigments and dyes, offering excellent color properties and stability. It is primarily required by manufacturers in the pigment, specialty dye, and advanced material industries for producing vibrant and durable colorants.

Application

This specialized azo intermediate serves as a key building block in several high-value industrial processes.

• Synthesis of High-Performance Organic Pigments: Core precursor for manufacturing azo pigments with enhanced lightfastness and weather resistance.
• Production of Specialty Dyes: Used in creating dyes for advanced applications in inks, coatings, and plastics.
• Research & Development: Serves as a critical reagent in chemical R&D for developing new colorants and functional materials.
• Textile Dye Manufacturing: Intermediate in the production of dyes for synthetic fibers requiring specific color shades and fastness properties.
• Functional Material Synthesis: Potential use in creating materials for optoelectronics and sensor technologies due to its conjugated structure.

Basic Information

Product Name	2-[[1-(6-Chloro-o-Tolyl)-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-4-Yl]Azo]Naphthalene-1-Sulphonic Acid
CAS No.	70833-47-5
Molecular Formula	C21H17ClN4O4S
Molecular Weight	456.90 g/mol
Synonyms	2-[(1-(6-Chloro-2-methylphenyl)-3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-4-yl)azo]naphthalene-1-sulfonic acid; 1-Naphthalenesulfonic acid, 2-[[1-(6-chloro-2-methylphenyl)-3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-4-yl]azo]-; Azo dye intermediate 70833-47-5; 6-Chloro-o-tolyl pyrazolone azo naphthalene sulfonate; Pigment Yellow 191 intermediate; PY 191 intermediate; Cl 12790:1 intermediate (related)
EINECS	Contact for details

Quality Control

Our production of 2-[[1-(6-Chloro-o-Tolyl)-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-4-Yl]Azo]Naphthalene-1-Sulphonic Acid adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing to ensure high purity, consistent composition, and batch-to-batch reliability. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are available upon request 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Orange to Reddish-Brown 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
Related Substances (HPLC)	Total impurities ≤ 3.0%

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