Description

6-[1-Hydroxy-3-Sulfo-6-[[2-(Methylsulfonyl)-5-Chloro-6-Methyl-4-Pyrimidinyl]Amino]-2-Naphtylazo]-1,3,5-Naphthalenetrisulfonic Acid Tetrasodium Salt is a high-purity, water-soluble anionic dye intermediate of significant industrial importance. Its complex polycyclic structure with multiple sulfonate groups makes it a key precursor for synthesizing specialized reactive and direct dyes. This compound is essential for manufacturers in the textile and specialty chemical industries seeking to produce high-performance, colorfast dyes with specific chromatic properties.

Application

• Primary Intermediate for Reactive Dyes: Serves as a critical building block in the synthesis of high-value reactive dyes for cotton and cellulose fiber dyeing.
• Direct Dye Synthesis: Used in the production of direct dyes for paper, leather, and polyamide fibers, leveraging its strong affinity and solubility.
• Specialty Pigment Manufacturing: Acts as a functional intermediate for creating complex organic pigments with enhanced lightfastness and thermal stability.
• Biomedical Staining Reagents: Potential use in the development of histological or cytological staining agents due to its chromophoric structure.
• Analytical Chemistry Indicators: Can be utilized in the formulation of pH-sensitive indicators or complexometric titration agents.
• Functional Material Research: Investigated for applications in advanced materials, such as dye-sensitized solar cells (DSSCs) or optical sensors.

Basic Information

Product Name	6-[1-Hydroxy-3-Sulfo-6-[[2-(Methylsulfonyl)-5-Chloro-6-Methyl-4-Pyrimidinyl]Amino]-2-Naphtylazo]-1,3,5-Naphthalenetrisulfonic Acid Tetrasodium Salt
CAS No.	72639-32-8
Molecular Formula	C26H17ClN6Na4O16S5 (or corresponding acid form)
Molecular Weight	Contact for details
Synonyms	Tetrasodium 6-[1-hydroxy-3-sulfo-6-[[2-(methylsulfonyl)-5-chloro-6-methyl-4-pyrimidinyl]amino]-2-naphthylazo]-1,3,5-naphthalenetrisulfonate
Reactive Dye Intermediate 72639-32-8
Acid Tetrasodium Salt Dye Intermediate
Chloro-methyl-pyrimidinyl azo naphthalene sulfonate
5-Chloro-6-methyl-2-methylsulfonyl-4-[(1-hydroxy-3,6-disulfo-2-naphthyl)azo]phenylamino-1,3,5-naphthalenetrisulfonic acid tetrasodium salt
C.I. Reactive Orange (related intermediate)
Contact for additional synonyms and trade names.
EINECS	Contact for details

Quality Control

Our production of 6-[1-Hydroxy-3-Sulfo-6-[[2-(Methylsulfonyl)-5-Chloro-6-Methyl-4-Pyrimidinyl]Amino]-2-Naphtylazo]-1,3,5-Naphthalenetrisulfonic Acid Tetrasodium Salt adheres to a stringent quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and compliance with agreed specifications. Certificates of Analysis (COA) detailing all critical parameters are provided with each shipment to guarantee traceability and 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 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 stability and handling properties. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark brown to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Water Content (KF)	Max. 5.0%
Solubility (in Water)	Freely soluble
Heavy Metals (as Pb)	Max. 20 ppm
Related Substances (HPLC)	Total impurities: Max. 5.0%

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