Description

6-[(2,4-Diaminophenyl)azo]-3-[[4-[[4-[[7-[(2,4-diamino-5-sulfophenyl)azo]-1-hydroxy-3-sulfo-2-naphthalenyl]azo]phenyl]amino]-3-sulfophenyl]azo]-4-hydroxy-2-naphthalenesulfonic acid tetrasodium salt is a high-purity, complex azo dye intermediate essential for producing specialized colorants. This compound is valued for its ability to impart specific, stable hues and its reactivity in synthesizing dyes with enhanced properties. It is a critical raw material for manufacturers in the textile, leather, ink, and specialty chemical industries seeking to develop high-performance color products.

Application

• Textile Dyeing: A key intermediate for synthesizing reactive and direct dyes used on cotton, wool, and nylon fibers.
• Leather Coloring: Used in the production of dyes for achieving deep, uniform colors on leather goods.
• Ink Manufacturing: Serves as a precursor for pigments in industrial inks, including those for packaging and printing.
• Specialty Chemical Synthesis: Employed in research and production of advanced colorants for plastics, coatings, and other polymers.
• Biological Staining: Potential use as an intermediate for histological stains and indicators in laboratory settings.
• Paper Coloring: Can be used in the development of dyes for specialty paper products.

Basic Information

Item	Details
Product Name	6-[(2,4-Diaminophenyl)azo]-3-[[4-[[4-[[7-[(2,4-diamino-5-sulfophenyl)azo]-1-hydroxy-3-sulfo-2-naphthalenyl]azo]phenyl]amino]-3-sulfophenyl]azo]-4-hydroxy-2-naphthalenesulfonic acid tetrasodium salt
CAS No.	72987-18-9
Molecular Formula	C44H30N12Na4O16S4
Molecular Weight	~1190.0 g/mol (Contact for exact details)
Synonyms	Direct Black 22 (Tetrasodium Salt); C.I. 35435; Tetrasodium 6-[(2,4-diaminophenyl)azo]-3-[[4-[[4-[[7-[(2,4-diamino-5-sulfophenyl)azo]-1-hydroxy-3-sulfo-2-naphthalenyl]azo]phenyl]amino]-3-sulfophenyl]azo]-4-hydroxy-2-naphthalenesulfonate; Azo Black Dye Intermediate; 72987-18-9; CAS 72987-18-9
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and purity. Each lot undergoes comprehensive analytical testing, including HPLC for purity and spectrophotometric analysis for color strength verification. Certificates of Analysis (COA) detailing all specifications are provided with every shipment to support your quality assurance processes.

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 sealed to prevent absorption of atmospheric moisture. Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Dark blue to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Solubility (in Water)	Completely soluble
Heavy Metals (as Pb)	Max. 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.