Description

3-[[4-[(4-Hydroxyphenyl)Azo]-3-Methoxyphenyl]Azo]Benzenesulphonic Acid is a high-purity azo dye intermediate essential for producing vivid and stable colorants. Its value lies in its precise molecular structure, which enables the synthesis of specialized dyes with excellent lightfastness and color strength for demanding applications. This compound is primarily needed by manufacturers in the textile, ink, and specialty chemical industries seeking reliable intermediates for high-performance dye production.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of orange, red, and brown azo dyes and pigments.
• Textile Dyeing: Used in the production of dyes for coloring natural and synthetic fibers, including cotton, wool, and polyamide.
• Ink Formulation: Employed in the manufacture of industrial and printing inks requiring specific color shades and stability.
• Leather Coloring: Acts as an intermediate for dyes used in the leather tanning and finishing industry.
• Paper Coloring: Utilized in the production of dyes for specialty paper and packaging materials.
• Research & Development: Serves as a standard or reagent in chemical research for developing new colorant molecules and studying azo chemistry.

Basic Information

Product Name	3-[[4-[(4-Hydroxyphenyl)Azo]-3-Methoxyphenyl]Azo]Benzenesulphonic Acid
CAS No.	68400-41-9
Molecular Formula	C19H16N4O5S
Molecular Weight	412.42 g/mol
Synonyms	Benzenesulfonic acid, 3-[[4-[(4-hydroxyphenyl)azo]-3-methoxyphenyl]azo]-; 3-[(4-[(4-Hydroxyphenyl)azo]-3-methoxyphenyl)azo]benzenesulfonic acid; CI 26080; Disperse Orange 30 intermediate; Azo dye intermediate 68400-41-9; 3-((4-((4-Hydroxyphenyl)diazenyl)-3-methoxyphenyl)diazenyl)benzenesulfonic acid
EINECS	Contact for details

Quality Control

Our 3-[[4-[(4-Hydroxyphenyl)Azo]-3-Methoxyphenyl]Azo]Benzenesulphonic Acid is produced under strict quality management systems. Every batch undergoes rigorous analytical testing to ensure consistent purity, color value, and chemical identity. Certificates of Analysis (COA) detailing assay, impurity profile, and physical specifications 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 tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product quality.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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