Description

Tetrasodium [Mu-[[3,3'-[(3,3'-Dihydroxy[1,1'-Biphenyl]-4,4'-Diyl)Bis(Azo)]Bis[5-Amino-4-Hydroxynaphthalene-2,7-Disulphonato]](8-)]]Dicuprate(4-) is a high-purity, complex copper-containing azo dye intermediate. This compound is valued for its role as a critical precursor in the synthesis of high-performance, colorfast dyes and pigments. It is primarily sought by manufacturers in the textile, leather, and specialty chemical industries for producing vivid and stable colorants. Its specific chelated structure offers enhanced thermal and chemical stability in final formulations.

Application

• Primary Intermediate for Dye Synthesis: A key building block for manufacturing high-grade direct, reactive, and metal-complex dyes.
• Textile Industry: Used in the production of dyes for coloring cotton, wool, nylon, and silk, offering excellent wash and light fastness.
• Leather Processing: Employed in the formulation of dyes for leather finishing, providing deep, uniform coloration.
• Pigment Manufacturing: Serves as a precursor for creating organic pigments used in inks, paints, and plastics.
• Paper Coloring: Utilized in the production of dyes for specialty paper and packaging materials.
• Research & Development: Acts as a reference standard and starting material in chemical research for novel chromophores.

Basic Information

Product Name	Tetrasodium [Mu-[[3,3'-[(3,3'-Dihydroxy[1,1'-Biphenyl]-4,4'-Diyl)Bis(Azo)]Bis[5-Amino-4-Hydroxynaphthalene-2,7-Disulphonato]](8-)]]Dicuprate(4-)
CAS No.	28407-37-6
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Direct Blue 218; Copper complex of direct blue 218; Tetrasodium copper complex of direct blue 218; Direct Blue 218, Copper complex; [Mu-[[3,3'-[(3,3'-Dihydroxy[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[5-amino-4-hydroxynaphthalene-2,7-disulphonato]]](8-)]dicuprate(4-), tetrasodium; 28407-37-6; Direct Blue 218 (Copper complex)
EINECS	Contact for details

Quality Control

Our Tetrasodium [Mu-[[3,3'-[(3,3'-Dihydroxy[1,1'-Biphenyl]-4,4'-Diyl)Bis(Azo)]Bis[5-Amino-4-Hydroxynaphthalene-2,7-Disulphonato]](8-)]]Dicuprate(4-) is produced under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, composition, and performance. Certificates of Analysis (COA) detailing key specifications such as assay, heavy metal content, and identification are available upon request to support your quality assurance protocols.

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) and light-sensitive; containers must be kept tightly sealed after opening to minimize exposure to atmospheric moisture and light to maintain product integrity.

Specification

Item	Specification
Appearance	Dark blue to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Loss on Drying	Max. 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	Max. 20 ppm
Solubility (in Water)	Soluble

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