Description

Tetrasodium 2,2'-[(3,3'-Dimethoxy[1,1'-Biphenyl]-4,4'-Diyl)Bis[Azo(2-Amino-5-Hydroxy-7-Sulphonato-6,1-Naphthylene)Azo]]Bis[5-Nitrobenzoate] is a high-purity, water-soluble azo dye intermediate of significant industrial importance. This compound is valued for its role in synthesizing high-performance dyes and pigments, offering excellent color strength and stability. It is primarily sought by manufacturers in the textile, ink, and specialty coatings industries for producing vivid and durable colors.

Application

• Textile Dyeing: A key intermediate for the synthesis of reactive and direct dyes used on cotton, wool, and nylon fibers.
• Ink Manufacturing: Used in the production of high-quality printing inks, including those for packaging and security applications.
• Pigment Production: Serves as a precursor for manufacturing organic pigments used in plastics, paints, and coatings.
• Leather Coloring: Employed in the formulation of dyes for the leather tanning and finishing industry.
• Paper Coloring: Used in the production of dyes for specialty papers and paper products.
• Research & Development: A vital chemical for R&D laboratories focusing on novel chromophores and dye chemistry.

Basic Information

Product Name	Tetrasodium 2,2'-[(3,3'-Dimethoxy[1,1'-Biphenyl]-4,4'-Diyl)Bis[Azo(2-Amino-5-Hydroxy-7-Sulphonato-6,1-Naphthylene)Azo]]Bis[5-Nitrobenzoate]
CAS No.	70210-33-2
Molecular Formula	C58H34N10Na4O24S2
Molecular Weight	~1353.0 g/mol
Synonyms	Direct Blue 1; C.I. 24410; Tetrasodium Direct Blue 1; Direct Blue 1, Tetrasodium Salt; Benzoic acid, 5-nitro-2-[[4'-[[2-(2-amino-5-hydroxy-7-sulfo-1-naphthalenyl)diazenyl][1,1'-biphenyl]-4-yl]azo]-2-methoxy[1,1'-biphenyl]-4-yl]azo]-, sodium salt (1:4); C.I. Direct Blue 1; Pontamine Blue 4BX
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC for purity and spectrophotometric analysis for color value, to ensure consistency and performance. A detailed Certificate of Analysis (COA) is provided with each shipment, confirming compliance with agreed specifications.

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 to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark Blue to Black Powder
Identification (IR)	Conforms to Standard
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 5% (vs. Standard)
Moisture (Karl Fischer)	≤ 5.0%
Water Solubility	Clear Solution
Ash Content	≤ 20.0%

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