Description

Disodium 7-[(4-Aminobenzoyl)Amino]-4-Hydroxy-3-[[4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]Naphthalene-2-Sulphonate is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its value lies in its role as a key precursor for synthesizing vibrant and stable dyes and pigments, particularly for demanding applications requiring specific color properties and fastness. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries who require consistent, high-quality intermediates for their production processes.

Application

• Textile Dyeing: A critical intermediate for the synthesis of reactive and direct azo dyes used for coloring cotton, wool, and nylon fibers.
• Ink Manufacturing: Serves as a precursor for producing high-performance pigments and dyes used in printing inks for packaging and publications.
• Specialty Pigments: Used in the creation of pigments for paints, coatings, and plastics where specific shades and durability are required.
• Biological Staining: Potential use as an intermediate for histological stains and indicators in laboratory settings.
• Research & Development: Employed as a standard or building block in chemical research for developing new chromophores and functional materials.

Basic Information

Product Name	Disodium 7-[(4-Aminobenzoyl)Amino]-4-Hydroxy-3-[[4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]Naphthalene-2-Sulphonate
CAS No.	5938-85-2
Molecular Formula	C29H20N6Na2O8S2
Molecular Weight	690.61 g/mol
Synonyms	Acid Red 266; C.I. 18133; Disodium 4-hydroxy-3-[[4-[(4-sulfophenyl)azo]phenyl]azo]-5-[(4-aminobenzoyl)amino]-2,7-naphthalenedisulfonate; 7-[(4-Aminobenzoyl)amino]-4-hydroxy-3-[[4-[(4-sulfophenyl)azo]phenyl]azo]-2-naphthalenesulfonic acid disodium salt; C.I. Acid Red 266; Azo dye intermediate 5938-85-2
EINECS	227-694-7

Quality Control

Our Disodium 7-[(4-Aminobenzoyl)Amino]-4-Hydroxy-3-[[4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]Naphthalene-2-Sulphonate is produced under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise specifications for purity, color strength, and impurity profiles. Certificates of Analysis (COA) detailing results for assay, heavy metals, and related substances 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). This material is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	Dark red to 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 ≤ 3.0%
Solubility (in Water)	Freely soluble

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