Description

6,6'-[(3,3'-Dimethyl-1,1'-Biphenyl-4,4'-Diyl)Bis(Azo)]Bis[4-Amino-5-Hydroxy-1-Naphthalenesulfonic Acid]Disodium Salt is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its value lies in its role as a key precursor for synthesizing a range of vibrant and stable dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce high-performance colorants.

Application

• Primary Intermediate for Azo Dyes & Pigments: Serves as a crucial building block in the synthesis of high-grade, complex azo dyes, particularly for cotton and other cellulosic fibers.
• Textile Dye Manufacturing: Used to produce direct, acid, and reactive dyes that offer excellent color fastness and brightness on fabrics.
• Inkjet and Printing Ink Formulation: A key component in creating specialized inks that require high color strength and stability.
• Lakes and Pigment Production: Employed in the manufacture of insoluble pigment lakes used in paints, plastics, and coatings.
• Biological Staining Reagent: Finds application in histology and cytology as a staining agent for microscopic analysis.
• Research & Development: Used in chemical research for developing novel chromophores and studying azo coupling reactions.

Basic Information

Product Name	6,6'-[(3,3'-Dimethyl-1,1'-Biphenyl-4,4'-Diyl)Bis(Azo)]Bis[4-Amino-5-Hydroxy-1-Naphthalenesulfonic Acid]Disodium Salt
CAS No.	2609-87-2
Molecular Formula	C40H28N6Na2O10S2
Molecular Weight	854.78 g/mol
Synonyms	Direct Blue 2; C.I. 22590; Amanil Sky Blue 6B; Azoamine Blue 2B; Benzo Sky Blue; Chloramine Sky Blue 6B; Diamine Sky Blue FF; Direct Sky Blue 6B; Direct Sky Blue FF; Pontamine Sky Blue 6BX; Sirius Supra Blue 6B; Sodium 4-amino-5-hydroxy-6-[[4'-[(4-amino-5-hydroxy-6-sulfo-1-naphthyl)azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-1-naphthalenesulfonate
EINECS	220-027-5

Quality Control

Our production of 6,6'-[(3,3'-Dimethyl-1,1'-Biphenyl-4,4'-Diyl)Bis(Azo)]Bis[4-Amino-5-Hydroxy-1-Naphthalenesulfonic Acid]Disodium Salt adheres to stringent quality protocols to ensure batch-to-batch consistency and high purity for demanding industrial applications. Each lot is analyzed against rigorous specifications, including assay, impurity profile, and color strength. 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). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Dark blue to bluish-black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Freely soluble, clear solution

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