Description

p-[4,5-Dihydro-4-[[2-Methoxy-5-Methyl-4-[[2-(Sulphooxy)Ethyl]Sulphonyl]Phenyl]Azo]-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl]Benzenesulphonic Acid, Sodium Salt is a high-purity, water-soluble anionic dye intermediate characterized by its complex azo-pyrazolone structure. This compound is engineered for superior color strength and stability, making it a critical component in the synthesis of high-performance dyes and pigments. It is primarily utilized by manufacturers in the textile, ink, and specialty coatings industries seeking consistent and reliable chromophores for demanding applications.

Application

• Textile Dyeing: A key intermediate for producing reactive and acid dyes for coloring nylon, wool, silk, and other protein fibers.
• Ink Manufacturing: Used in the formulation of high-quality inks for digital, packaging, and security printing applications.
• Specialty Coatings: Imparts color and functionality in industrial and automotive coatings where lightfastness is required.
• Paper Coloring: Employed in the production of dyes for specialty paper and paperboard products.
• Leather Finishing: Serves as an intermediate for dyes used in the leather tanning and finishing industry.
• Biological Staining: Potential use as a precursor for histological stains and indicators in laboratory settings.

Basic Information

Item	Detail
Product Name	p-[4,5-Dihydro-4-[[2-Methoxy-5-Methyl-4-[[2-(Sulphooxy)Ethyl]Sulphonyl]Phenyl]Azo]-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl]Benzenesulphonic Acid, Sodium Salt
CAS No.	62121-75-9
Molecular Formula	C20H19N4NaO11S3
Molecular Weight	610.56 g/mol
Synonyms	Benzenesulfonic acid, 4-[4,5-dihydro-4-[[2-methoxy-5-methyl-4-[(2-sulfooxyethyl)sulfonyl]phenyl]azo]-3-methyl-5-oxo-1H-pyrazol-1-yl]-, sodium salt (1:1); Sodium 4-(4,5-dihydro-4-{[2-methoxy-5-methyl-4-(2-sulfonatooxyethylsulfonyl)phenyl]hydrazono}-3-methyl-5-oxopyrazol-1-yl)benzenesulfonate; C.I. Reactive Orange 16 intermediate; Azo pyrazolone dye intermediate; Acid Orange 116 related compound; 1-(4-Sulfophenyl)-3-methyl-4-{[2-methoxy-5-methyl-4-(2-sulfooxyethylsulfonyl)phenyl]azo}-5-pyrazolone sodium salt
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management systems to ensure batch-to-batch consistency and purity. Every lot is tested against stringent in-house specifications using advanced analytical techniques including HPLC and spectrophotometry. A comprehensive Certificate of Analysis (COA) detailing identity, assay, impurity profile, and physical parameters is provided with each shipment to support your quality assurance protocols.

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 nature, the container must be kept tightly sealed after initial use to prevent moisture absorption, which can affect performance. Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
Sulfated Ash	Contact for details

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