Description

Tetrasodium 4-amino-5-hydroxy-3-[[4-[[4-[[4-hydroxy-2-[(o-tolyl)amino]phenyl]azo]phenyl]amino]-3-sulphonatophenyl]azo]-6-[(4-sulphonatophenyl)azo]naphthalene-2,7-disulphonate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. This compound is valued for its ability to impart specific, vibrant color properties and its compatibility with various industrial dyeing and printing processes. It is primarily utilized by manufacturers in the textile, ink, and specialty coatings industries seeking consistent and reliable colorant precursors.

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-performance inks for digital, packaging, and security printing applications.
• Leather Coloring: Employed in the formulation of dyes for achieving uniform and durable coloration on leather goods.
• Paper Staining: Suitable for the coloration of specialty papers and paper products requiring specific hue and fastness.
• Plastic and Polymer Coloring: Acts as a colorant precursor for certain engineering plastics and synthetic materials.
• Research & Development: Serves as a critical reagent in chemical research for developing new chromophores and functional dyes.

Basic Information

Product Name	Tetrasodium 4-amino-5-hydroxy-3-[[4-[[4-[[4-hydroxy-2-[(o-tolyl)amino]phenyl]azo]phenyl]amino]-3-sulphonatophenyl]azo]-6-[(4-sulphonatophenyl)azo]naphthalene-2,7-disulphonate
CAS No.	93982-63-9
Molecular Formula	C46H32N10Na4O16S4
Molecular Weight	~1192.0 g/mol (Contact for exact details)
Synonyms	Tetrasodium 1-amino-4-[[4-[(4-aminophenyl)azo]phenyl]amino]-9,10-dihydro-9,10-dioxo-2-anthracenesulfonate (related isomer), C.I. Reactive Black 5 intermediate, Polyazo dye intermediate, Tetrasulfonated azo dye precursor, Water-soluble black dye intermediate, 93982-63-9, Azo dye, tetrasodium salt
EINECS	Contact for details

Quality Control

Our tetrasodium azo dye intermediate is manufactured under strict quality protocols to ensure batch-to-batch consistency and performance. Quality is verified through comprehensive analytical testing including HPLC for purity, spectrophotometry for color strength, and identification by IR. A Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications is provided with each shipment to guarantee compliance with your technical requirements.

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); keep the container tightly sealed when not in use to prevent absorption of atmospheric moisture, which may affect performance.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Color Strength	100% ± 5% (vs. Standard)
Water Content (KF)	Max. 5.0%
Solubility (in Water)	Completely soluble
pH (1% Solution)	7.0 - 9.0
Heavy Metals (as Pb)	Max. 20 ppm

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