Description

Disodium 5-[(2-Hydroxy-5-Methylphenyl)Azo]-2-[2-(4-Nitro-2-Sulphonatophenyl)Vinyl]Benzenesulphonate is a high-purity, synthetic azo dye intermediate known for its distinct chromophoric properties. This compound is critical for manufacturers requiring precise color development and excellent batch-to-batch consistency in demanding applications. It is primarily utilized by producers of specialized dyes, pigments, and colorants for the textile, ink, and advanced materials sectors.

Application

• Key intermediate in the synthesis of high-performance azo dyes and pigments for textiles and fabrics.
• Used in the manufacturing of specialized inks, including those for security printing and digital applications.
• Acts as a functional colorant precursor in the production of colored polymers and plastics.
• Employed in research and development for novel optical materials and sensors.
• Potential use in the formulation of biological stains and histological dyes for laboratory analysis.
• Serves as a standard or reference material for quality control and analytical testing in colorant industries.

Basic Information

Product Name	Disodium 5-[(2-Hydroxy-5-Methylphenyl)Azo]-2-[2-(4-Nitro-2-Sulphonatophenyl)Vinyl]Benzenesulphonate
CAS No.	73281-07-9
Molecular Formula	C21H14N3Na2O10S2
Molecular Weight	569.45 g/mol
Synonyms	Disodium 5-[(2-hydroxy-5-methylphenyl)azo]-2-[2-(4-nitro-2-sulfonatophenyl)ethenyl]benzenesulfonate; 2,2'-(1,2-Ethenediyl)bis[5-[(2-hydroxy-5-methylphenyl)azo]benzenesulfonic acid] disodium salt; CI 26360; Azo dye intermediate 73281-07-9; 5-[(2-Hydroxy-5-methylphenyl)azo]-2-styrylbenzenesulfonic acid disodium salt; Benzenesulfonic acid, 5-[(2-hydroxy-5-methylphenyl)azo]-2-[2-(4-nitro-2-sulfophenyl)ethenyl]-, disodium salt
EINECS	Contact for details

Quality Control

Our Disodium 5-[(2-Hydroxy-5-Methylphenyl)Azo]-2-[2-(4-Nitro-2-Sulphonatophenyl)Vinyl]Benzenesulphonate is produced under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for colorant synthesis. Certificates of Analysis (COA) detailing all critical parameters are available upon request 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 (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 5.0%

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