Description

Sodium 2-[[2-Amino-6-[[4'-[(3-Carboxy-4-Hydroxyphenyl)Azo]-3,3'-Dimethoxy[1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-7-Sulpho-1-Naphthyl]Azo]-5-Nitrobenzoate is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its complex polyazo structure provides excellent chromophoric properties, making it a critical precursor for synthesizing high-performance dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce vibrant, stable colors with specific technical characteristics.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-quality reactive dyes for cotton and cellulose fiber dyeing, offering excellent wash and light fastness.
• Specialty Pigment Manufacturing: Used in the production of high-performance organic pigments for automotive paints, industrial coatings, and plastics coloration.
• Inkjet Ink Formulations: Serves as a precursor for dyes used in professional and industrial digital printing inks, providing a wide color gamut and stability.
• Functional Dye Synthesis: Employed in research and production of functional dyes for applications in optical data storage, liquid crystal displays (LCDs), and sensors.
• Textile Printing: Used in the manufacture of dyes for textile printing pastes, ensuring sharp definition and color yield on fabric.
• Laboratory Research & Development: A valuable chemical for R&D chemists exploring new chromophores, dye-polymer interactions, and advanced material science.

Basic Information

Item	Details
Product Name	Sodium 2-[[2-Amino-6-[[4'-[(3-Carboxy-4-Hydroxyphenyl)Azo]-3,3'-Dimethoxy[1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-7-Sulpho-1-Naphthyl]Azo]-5-Nitrobenzoate
CAS No.	93964-42-2
Molecular Formula	C44H28N8Na2O13S
Molecular Weight	962.78 g/mol
Synonyms	Benzoic acid, 2-[(2-amino-6-[[4'-[(3-carboxy-4-hydroxyphenyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-5-hydroxy-7-sulfo-1-naphthalenyl)azo]-5-nitro-, disodium salt; C.I. Reactive Red 238; Reactive Red 238; Disodium 2-[(2-amino-6-{[4'-[(3-carboxy-4-hydroxyphenyl)diazenyl]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]diazenyl}-5-hydroxy-7-sulfonato-1-naphthyl)diazenyl]-5-nitrobenzoate; Azo dye intermediate RR238; Sodium salt of polyazo dye acid
EINECS	Contact for details

Quality Control

Our Sodium 2-[[2-Amino-6-[[4'-[(3-Carboxy-4-Hydroxyphenyl)Azo]-3,3'-Dimethoxy[1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-7-Sulpho-1-Naphthyl]Azo]-5-Nitrobenzoate is manufactured under a strict quality management system to ensure batch-to-batch consistency and high purity. Our products undergo rigorous quality testing to ensure compliance with industry standards. Certificates of Analysis (COA) detailing purity, impurity profile, and other critical parameters are available upon request.

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 nature, the container must be kept tightly sealed after each use to prevent moisture absorption, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
pH (1% Solution)	6.0 - 8.0

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