Description

Tetrasodium 8,8'-[Cyclohexylidenebis(4,1-Phenyleneazo)]Bis[7-Hydroxynaphthalene-1,3-Disulphonate] is a high-purity, water-soluble anionic dye belonging to the class of azo compounds. This specialized chemical is valued for its strong chromophore and stability, making it a critical component for imparting intense and durable color. It is primarily sought after by manufacturers in the textile, ink, and specialty coatings industries who require precise and consistent colorants for their formulations.

Application

• Textile Dyeing: Used as a direct or reactive dye for coloring natural and synthetic fibers, including cotton, wool, and nylon.
• Ink Manufacturing: Serves as a key pigment for producing high-quality printing inks, including those for packaging and security applications.
• Industrial Coatings: Incorporated into coatings and paints where specific, light-fast color properties are required.
• Paper Coloring: Applied in the surface coloring and coating of specialty papers and boards.
• Biological Staining: Potential use as a histological stain in laboratory settings due to its affinity for specific cellular structures.
• Plastics and Polymers: Used for mass coloration of certain plastics and polymer matrices.
• Research & Development: Employed as a standard or intermediate in chemical research and the synthesis of more complex dye molecules.

Basic Information

Product Name	Tetrasodium 8,8'-[Cyclohexylidenebis(4,1-Phenyleneazo)]Bis[7-Hydroxynaphthalene-1,3-Disulphonate]
CAS No.	85098-59-5
Molecular Formula	C₄₀H₂₄N₄Na₄O₁₄S₄
Molecular Weight	~ 998.8 g/mol
Synonyms	Acid Black 210; C.I. 300310; Tetrasodium 8,8'-(Cyclohexylidenedi-4,1-phenylene)bis(diazen-2-yl-1)]bis(7-hydroxynaphthalene-1,3-disulfonate); Direct Black 166; Azo Black Dye; 8,8'-[Cyclohexylidenebis(4,1-phenylenazo)]di[7-hydroxy-1,3-naphthalenedisulfonic acid] tetrasodium salt; Solvent Black 7 (related class)
EINECS	Contact for details

Quality Control

Our production of Tetrasodium 8,8'-[Cyclohexylidenebis(4,1-Phenyleneazo)]Bis[7-Hydroxynaphthalene-1,3-Disulphonate] adheres to stringent quality protocols to ensure batch-to-batch consistency and performance. Each lot is analyzed for critical parameters including purity, color strength, and impurity profile. Certificates of Analysis (COA) documenting these results are available upon request 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 room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark blue to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 5% (vs. Standard)
Water Content (KF)	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear solution

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