Description

Tetrasodium 5-[(6-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-8-[[4-[[4-[(6-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]phenyl]amino]-3-sulphonatophenyl]azo]naphthalene-2-sulphonate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its complex, multi-sulfonated structure provides excellent solubility and binding affinity, making it a critical precursor for the synthesis of specialized dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce vivid, stable colors with specific technical properties.

Application

This advanced azo dye intermediate is engineered for high-performance applications where color strength and chemical stability are paramount.

• Primary precursor for reactive and direct dyes used in textile dyeing and printing, particularly for cotton and other cellulose fibers.
• Key intermediate in the manufacture of high-grade pigments for inks, including those used in packaging and security printing.
• Specialty dye synthesis for research and development of novel colorants with specific lightfastness and washfastness properties.
• Production of colorants for paper and other specialty industrial applications requiring intense, water-soluble dyes.

Basic Information

Product Name	Tetrasodium 5-[(6-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-8-[[4-[[4-[(6-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]phenyl]amino]-3-sulphonatophenyl]azo]naphthalene-2-sulphonate
CAS No.	83950-05-4
Molecular Formula	C44H28N10Na4O16S4
Molecular Weight	~1188.94 g/mol
Synonyms	Tetrasodium 8-[[4-[[4-[(6-Amino-1-hydroxy-3-sulfo-2-naphthyl)azo]phenyl]amino]-3-sulfophenyl]azo]-5-[(6-amino-1-hydroxy-3-sulfo-2-naphthyl)azo]-2,7-naphthalenedisulfonate; C.I. Direct Blue 78 (tetrasodium salt); Direct Blue 78; Amanil Sky Blue FF; Pontamine Sky Blue 6BX; Azo Dye Intermediate 83950-05-4; Tetranaphthyl Azo Tetrasulfonate Derivative
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and purity for downstream synthesis. Quality is verified through advanced analytical techniques including HPLC and spectrophotometry. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are provided with every shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled 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 and handling properties.

Specification

Item	Specification
Appearance	Dark blue to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Water Solubility	Freely soluble
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	< 20 ppm

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