Description

Disodium 3-[[2,4-Bis(2-Methylphenoxy)Phenyl]Azo]-4-Hydroxy-5-[[(p-Tolyl)Sulphonyl]Amino]Naphthalene-2,7-Disulphonate is a high-purity, synthetic azo dye intermediate known for its specific chromophore structure. This compound matters for its role in producing vivid and stable colorants, particularly in applications requiring high lightfastness and chemical resistance. It is primarily needed by manufacturers in the textile, ink, and specialty coatings industries for developing advanced dye formulations.

Application

• Textile Dyeing: As a key intermediate for synthesizing high-performance azo dyes used on polyester, nylon, and other synthetic fibers.
• Ink Manufacturing: For the production of pigments and dyes used in printing inks, including packaging and security inks.
• Industrial Coatings: In the formulation of specialty paints and coatings for plastics and metals where color stability is critical.
• Research & Development: Serving as a standard or building block in chemical research for novel chromophores and functional dyes.
• Plastics and Masterbatch: For coloring engineering plastics and creating color concentrates.
• Analytical Chemistry: Potential use as a staining agent or indicator in specific analytical methodologies.

Basic Information

Item	Details
Product Name	Disodium 3-[[2,4-Bis(2-Methylphenoxy)Phenyl]Azo]-4-Hydroxy-5-[[(p-Tolyl)Sulphonyl]Amino]Naphthalene-2,7-Disulphonate
CAS No.	70210-05-8
Molecular Formula	C40H30N4Na2O10S3
Molecular Weight	884.83 g/mol
Synonyms	Acid Red 337; C.I. 17200; Disodium 5-[(4-methylphenyl)sulfonyl]amino]-3-[[2,4-bis(2-methylphenoxy)phenyl]azo]-4-hydroxy-2,7-naphthalenedisulfonate; 3-[[2,4-Bis(2-methylphenoxy)phenyl]azo]-4-hydroxy-5-[[(4-methylphenyl)sulfonyl]amino]-2,7-naphthalenedisulfonic acid disodium salt; Azo dye intermediate 70210-05-8; C.I. Acid Red 337; Mordant dye intermediate.
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality control protocols to ensure batch-to-batch consistency and purity. Each lot is analyzed using advanced techniques like HPLC and spectrophotometry to confirm identity and strength. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications is provided with every shipment to support your quality assurance processes.

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). Keep away from incompatible materials such as strong oxidizing agents. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in water)	Partially soluble, forms colloidal solution

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