Description

1,2-Dihydro-6-Hydroxy-1,4-Dimethyl-2-Oxo-5-[[4-[[2-(Sulphooxy)Ethyl]Sulphonyl]Phenyl]Azo]Pyridine-3-Sulphonic Acid, Sodium Salt is a high-purity, water-soluble synthetic organic dye intermediate characterized by its azo and sulphonic acid functional groups. This compound is valued for its ability to impart vivid and stable coloration, making it a critical component in the production of advanced dyes and pigments. It is primarily sought after by manufacturers in the textile, ink, and specialty coatings industries for developing high-performance colorants with excellent fastness properties.

Application

• Textile Dyeing: As a key intermediate for synthesizing reactive and acid dyes for coloring natural and synthetic fibers like cotton, wool, and nylon.
• Ink Manufacturing: Used in the formulation of high-quality printing inks, including those for inkjet and packaging, to achieve bright, consistent hues.
• Industrial Pigments: Serves as a precursor for creating organic pigments used in plastics, paints, and specialty coatings.
• Paper Coloring: Employed in the production of dyes for coloring paper and paperboard products.
• Leather Finishing: Utilized in dye formulations for the leather tanning and finishing industry.
• Research & Development: Acts as a standard or building block in chemical research for developing new chromophores and functional materials.

Basic Information

Item	Detail
Product Name	1,2-Dihydro-6-Hydroxy-1,4-Dimethyl-2-Oxo-5-[[4-[[2-(Sulphooxy)Ethyl]Sulphonyl]Phenyl]Azo]Pyridine-3-Sulphonic Acid, Sodium Salt
CAS No.	94157-77-4
Molecular Formula	C16H15N3O11S3Na
Molecular Weight	584.54 g/mol
Synonyms	Acid Red 337 (sodium salt); C.I. 17200; Sodium 1,2-dihydro-6-hydroxy-1,4-dimethyl-2-oxo-5-[(4-[(2-sulfooxyethyl)sulfonyl]phenyl)azo]-3-pyridinecarboxylate; 5-[[4-[[2-(Sulphooxy)ethyl]sulphonyl]phenyl]azo]-1,2-dihydro-6-hydroxy-1,4-dimethyl-2-oxo-3-pyridine sulphonic acid sodium salt; Reactive Red Dye Intermediate; Azo Pyridine Dye
EINECS	Contact for details

Quality Control

Our 1,2-Dihydro-6-Hydroxy-1,4-Dimethyl-2-Oxo-5-[[4-[[2-(Sulphooxy)Ethyl]Sulphonyl]Phenyl]Azo]Pyridine-3-Sulphonic Acid, Sodium Salt is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, color strength, and impurity profiles. Certificates of Analysis (COA) documenting identity, assay, and related substances are available upon request to support your quality assurance and regulatory compliance needs.

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). Keep away from heat sources and incompatible materials. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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