Description

3-[[5-Methoxy-4-[(4-Methoxyphenyl)Azo]-2-Methylphenyl]Azo]Benzenesulfonic Acid Sodium Salt is a high-purity, water-soluble azo dye intermediate essential for producing vivid and stable colorants. Its value lies in its ability to impart strong, light-fast hues, particularly in shades of yellow to orange, making it a critical component for manufacturers requiring consistent and reliable coloration. This compound is primarily needed by producers of dyes and pigments for textiles, inks, and specialty coatings, where precise chemical structure ensures batch-to-batch uniformity and performance.

Application

• Primary Dye Intermediate: A key building block for synthesizing azo dyes used in textile dyeing and printing.
• Ink Manufacturing: Used in the formulation of industrial and specialty printing inks to achieve specific yellow-orange color shades.
• Pigment Production: Serves as a precursor for organic pigments applied in plastics, paints, and coatings.
• Paper Coloring: Employed in the production of dyed papers and paper products.
• Leather Dyeing: Utilized in the tanning industry for coloring leather goods.
• Research & Development: Acts as a standard or reagent in chemical research for developing new colorant molecules and studying azo chemistry.

Basic Information

Product Name	3-[[5-Methoxy-4-[(4-Methoxyphenyl)Azo]-2-Methylphenyl]Azo]Benzenesulfonic Acid Sodium Salt
CAS No.	70776-63-5
Molecular Formula	C21H19N4O5SNa
Molecular Weight	462.45 g/mol
Synonyms	Benzenesulfonic acid, 3-[[5-methoxy-4-[(4-methoxyphenyl)azo]-2-methylphenyl]azo]-, sodium salt; Sodium 3-((5-methoxy-4-((4-methoxyphenyl)diazenyl)-2-methylphenyl)diazenyl)benzenesulfonate; Azo dye intermediate Yellow 5G; Acid Yellow 5G sodium salt; C.I. 18965; Disperse Yellow 5G intermediate; 4-[(E)-(4-Methoxyphenyl)diazenyl]-5-methoxy-2-methyl-3-[(E)-phenyldiazenyl]benzenesulfonic acid sodium salt
EINECS	Contact for details

Quality Control

Our 3-[[5-Methoxy-4-[(4-Methoxyphenyl)Azo]-2-Methylphenyl]Azo]Benzenesulfonic Acid Sodium Salt is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, color strength, and solubility. Certificates of Analysis (COA) documenting key parameters 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 room temperature (15-25°C). Keep away from heat sources and incompatible materials. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Yellow to orange powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear solution

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