Description

Disodium 6-Methyl-2'-[4-[[4-(6-Methyl-7-Sulphonatobenzothiazol-2-Yl)Phenyl]Azo]Phenyl][2,6'-Bibenzothiazole]-7-Sulphonate is a high-purity, water-soluble anionic dye belonging to the benzothiazole azo class, valued for its strong and stable color properties. This compound is engineered to deliver exceptional performance in applications requiring vivid coloration and excellent light and chemical fastness. It is primarily sought after by manufacturers in the textile, specialty ink, and advanced material sectors for its reliable and consistent quality.

Application

• Textile Dyeing: Used as a key dye for synthetic fibers, particularly polyamides and polyesters, providing bright, wash-fast shades.
• Inkjet Inks: Serves as a colorant in high-performance industrial and graphic arts inks, offering excellent color gamut and stability.
• Paper Coloration: Employed in the production of specialty and decorative papers where high color strength is required.
• Leather Finishing: Applied in dyeing leather goods to achieve deep, uniform, and durable colors.
• Functional Material Additive: Investigated for use in optical filters, sensors, and other advanced material systems due to its specific light-absorption characteristics.
• Research & Development: Utilized as a standard or intermediate in chemical research, particularly in dye chemistry and photophysical studies.

Basic Information

Product Name	Disodium 6-Methyl-2'-[4-[[4-(6-Methyl-7-Sulphonatobenzothiazol-2-Yl)Phenyl]Azo]Phenyl][2,6'-Bibenzothiazole]-7-Sulphonate
CAS No.	83721-50-0
Molecular Formula	C34H20N6Na2O7S4
Molecular Weight	822.80 g/mol
Synonyms	Acid Blue 281; C.I. 61211; Disodium 6-methyl-2'-[4-[[4-(6-methyl-7-sulphonato-2-benzothiazolyl)phenyl]azo]phenyl][2,6'-bibenzothiazole]-7-sulphonate; 2,6'-Bibenzothiazole-7-sulfonic acid, 6-methyl-2'-[4-[[4-(6-methyl-7-sulfo-2-benzothiazolyl)phenyl]azo]phenyl]-, disodium salt; C.I. Acid Blue 281; Reactive Blue 281 (related class); Azo Benzothiazole Dye
EINECS	Contact for details

Quality Control

Our production of Disodium 6-Methyl-2'-[4-[[4-(6-Methyl-7-Sulphonatobenzothiazol-2-Yl)Phenyl]Azo]Phenyl][2,6'-Bibenzothiazole]-7-Sulphonate adheres to a stringent quality management system. Every batch is analyzed to ensure it meets precise specifications for color strength, purity, and impurity profile. Certificates of Analysis (COA) documenting key parameters are provided to guarantee traceability and compliance with your technical requirements.

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). Keep away from incompatible materials and sources of heat. The product is light-sensitive and should be stored away from light to maintain stability.

Specification

Item	Specification
Appearance	Dark blue to violet powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 3% (vs. Standard)
Water Content	≤ 5.0%
Ash Content (Sulfated)	≤ 30.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm

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