Description

Tetrasodium 2,2'-[Carbonylbis[Imino(2-Methyl-p-Phenylene)Azo(3-Sulphonato-p-Phenylene)]]Bis[6-Methylbenzothiazole-7-Sulphonate] is a high-purity, water-soluble anionic dye intermediate and specialty chemical. This compound is valued for its strong chromophore and functional groups that enable covalent bonding and complexation, making it a critical component for creating vivid and stable colors. It is primarily required by manufacturers in the textile dyeing, paper coloration, and specialty ink formulation industries, where consistent quality and performance are paramount.

Application

• Textile Dyeing: As a key intermediate for the synthesis of reactive and direct dyes for cotton, wool, and nylon.
• Paper Coloring: Used in the production of colored paper and paperboard, providing excellent affinity to cellulose fibers.
• Specialty Inks: A functional component in the formulation of high-performance inks for packaging and security printing.
• Biological Staining: Potential use as a staining agent or fluorescent probe in histology and microscopy due to its benzothiazole structure.
• Chemical Synthesis: Serves as a versatile building block for creating more complex azo dyes and functional polymers.
• Leather Finishing: Employed in dye formulations for leather goods to achieve deep, uniform shades.

Basic Information

Product Name	Tetrasodium 2,2'-[Carbonylbis[Imino(2-Methyl-p-Phenylene)Azo(3-Sulphonato-p-Phenylene)]]Bis[6-Methylbenzothiazole-7-Sulphonate]
CAS No.	85099-38-3
Molecular Formula	C48H32N10Na4O16S6
Molecular Weight	Approx. 1290.2 g/mol
Synonyms	Acid Blue 277; C.I. 612115; Tetrasodium 6,6'-[(Carbonylbis(imino-4,1-phenylene-2-methyl-4,1-phenyleneazo)]bis[4-methyl-7-sulpho-2-benzothiazolesulphonate]; Reactive Blue 277 Intermediate; Azo Benzothiazole Dye Intermediate; 85099-38-3 (CAS); Direct Blue 277 Analog
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot is tested against rigorous in-house specifications, which typically include parameters for identity, assay, impurity profile, and solubility. A Certificate of Analysis (COA) detailing these results is provided with every shipment 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 a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to prevent moisture absorption, which can affect product performance and handling.

Specification

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

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