Description

Disodium Hydrogen 2-[[2-Amino-6-[[3,3'-Dimethoxy-4'-[(1-Naphthyl-6-Sulphonato)Azo][1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-1-Naphthyl-7-Sulphonato]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, colorfast products.

Application

• Primary Intermediate for Reactive Dyes: Key building block for synthesizing high-quality reactive dyes used in cotton and cellulose fiber dyeing.
• Textile Colorant Production: Manufacture of dyes for wool, silk, and nylon, offering excellent wash and light fastness.
• Inkjet and Printing Inks: Used in the formulation of advanced inks for digital textile printing and high-resolution graphic arts.
• Specialty Pigments: Intermediate in the production of organic pigments for plastics, paints, and coatings.
• Research & Development: Serves as a reference standard and starting material in chemical research for novel chromophores.
• Leather Dyeing: Component in dye systems for achieving deep, uniform shades on leather goods.

Basic Information

Item	Detail
Product Name	Disodium Hydrogen 2-[[2-Amino-6-[[3,3'-Dimethoxy-4'-[(1-Naphthyl-6-Sulphonato)Azo][1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-1-Naphthyl-7-Sulphonato]Azo]-5-Nitrobenzoate
CAS No.	71278-41-6
Molecular Formula	C49H32N8Na2O15S3
Molecular Weight	~1122.99 g/mol
Synonyms	Reactive Black 5 Intermediate; Polyazo Dye Intermediate; C.I. Reactive Black 5 precursor; Disodium 2-[(2-Amino-5-hydroxy-3,6-disulfo-1-naphthyl)azo]-5-nitrobenzoate derivative; 1-Naphthalenesulfonic acid, 6-[[4'-[(7-amino-1-hydroxy-3,6-disulfo-2-naphthalenyl)azo][1,1'-biphenyl]-4-yl]azo]-3,3'-dimethoxy-, disodium salt; Azo dye CAS 71278-41-6; Textile dye intermediate 71278-41-6
EINECS	Contact for details

Quality Control

Our Disodium Hydrogen 2-[[2-Amino-6-[[3,3'-Dimethoxy-4'-[(1-Naphthyl-6-Sulphonato)Azo][1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-1-Naphthyl-7-Sulphonato]Azo]-5-Nitrobenzoate is produced under strict quality management systems to ensure batch-to-batch consistency and purity suitable for industrial synthesis. All products undergo rigorous quality testing, including chromatographic purity analysis and spectrophotometric identification, to ensure compliance with industry standards. Certificates of Analysis (COA) detailing purity, impurity profile, and physical specifications are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed when not in use to prevent absorption of atmospheric moisture, which may affect performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark blue to black powder or crystalline solid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 95.0% (Area %)
Water Content	≤ 5.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm
Solubility	Freely soluble in water

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