Description

Tetrasodium [mu-[7-[[4'-[[6-anilino-1-hydroxy-3-sulpho-2-naphthyl]azo]-3,3'-dihydroxy[1,1'-biphenyl]-4-yl]azo]-8-hydroxynaphthalene-1,3,6-trisulphonato(8-)]]dicuprate(4-) is a high-performance, complex metallized azo dye. This compound is valued for its exceptional color strength and stability, making it a critical component in demanding industrial coloring applications. It is primarily sought after by manufacturers in the textile, leather, and specialty ink industries who require durable and vibrant coloration.

Application

• Textile Dyeing: For coloring natural and synthetic fibers, particularly where high wash and light fastness are required.
• Leather Finishing: Used in the dyeing of leather goods to achieve deep, uniform shades with good rub fastness.
• Paper Coloring: Employed in the production of specialty papers, including decorative and packaging materials.
• Ink Formulation: A key pigment for industrial inks, including those used in packaging and security printing.
• Plastic and Polymer Coloring: For imparting color to plastics and resins where thermal stability is needed.
• Biological Staining (Research Grade): Potential use as a histological stain in laboratory settings, subject to specific purity grades.

Basic Information

Item	Details
Product Name	Tetrasodium [mu-[7-[[4'-[[6-anilino-1-hydroxy-3-sulpho-2-naphthyl]azo]-3,3'-dihydroxy[1,1'-biphenyl]-4-yl]azo]-8-hydroxynaphthalene-1,3,6-trisulphonato(8-)]]dicuprate(4-)
CAS No.	72927-72-1
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Direct Brown 223; Copper complex of direct brown dye; Tetrasodium dicuprate complex; Azo copper complex dye; Direct Brown 223, copper complex; C.I. 31745; Anionic metallized dye; Sulfonated azo-copper complex.
EINECS	Contact for details

Quality Control

Our production of tetrasodium dicuprate complex dye adheres to stringent quality management protocols. Every batch undergoes comprehensive analysis to ensure consistency in color value, strength, and impurity profile. Certificates of Analysis (COA) detailing specifications for assay, heavy metal content, and solubility are provided to guarantee compliance with industry and customer-specific 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). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product performance.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to standard
Assay (Dye Content)	Min. 90%
Moisture Content	Max. 5.0%
Water Solubility	Conforms
Heavy Metals (as Pb)	Max. 50 ppm
pH (1% Solution)	6.0 - 8.0
Ash Content	Max. 20%

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