Description

5-[[2,4-dihydroxy-5-[[4-(6-methylbenzothiazol-2-yl)phenyl]azo]phenyl]azo]-4-hydroxy-3-[[6-sulpho-4-[(4-sulphophenyl)azo]-1-naphthyl]azo]naphthalene-2,7-disulphonic acid, sodium salt is a high-performance, multi-azo anionic dye complex engineered for demanding coloration applications. Its complex molecular structure provides exceptional color strength, stability, and affinity, making it a critical component for achieving vibrant and durable shades. This product is essential for manufacturers in the textile, ink, and specialty coatings industries seeking superior colorfastness and performance in their formulations.

Application

• Textile Dyeing: Primary application for dyeing natural and synthetic fibers, particularly where high wash and light fastness are required.
• Inkjet Inks: Used in the formulation of high-quality pigment inks for industrial and graphic arts printing, offering excellent color gamut and stability.
• Leather Coloring: Provides deep, uniform coloration for finished leather goods with good rub fastness.
• Paper Coloring: Employed in specialty paper production for tinting and coating applications.
• Plastics and Polymers: Can be used as a colorant for certain plastics and resins, subject to compatibility testing.
• Biological Staining: Potential use as a specialized stain in histological or microbiological applications due to its azo structure.

Basic Information

Item	Details
Product Name	5-[[2,4-dihydroxy-5-[[4-(6-methylbenzothiazol-2-yl)phenyl]azo]phenyl]azo]-4-hydroxy-3-[[6-sulpho-4-[(4-sulphophenyl)azo]-1-naphthyl]azo]naphthalene-2,7-disulphonic acid, sodium salt
CAS No.	94022-55-6
Molecular Formula	C46H28N8O16S4Na4 (or related sodium salt form)
Molecular Weight	Contact for details
Synonyms	Reactive Black 5 (related class); Polyazo Black Dye; C.I. 20505; Sodium 5-[[2,4-dihydroxy-5-[(4-(6-methyl-1,3-benzothiazol-2-yl)phenyl)diazenyl]phenyl]diazenyl]-4-hydroxy-3-[[6-sulfo-4-[(4-sulfophenyl)diazenyl]naphthalen-1-yl]diazenyl]naphthalene-2,7-disulfonate; Multi-azo Naphthalene Dye; Anionic Polyazo Dye; Benzothiazole Azo Dye
EINECS	Contact for details

Quality Control

Our production of this advanced dye adheres to rigorous quality control protocols to ensure batch-to-batch consistency in color strength, purity, and performance. Every lot is tested against stringent internal specifications. A comprehensive Certificate of Analysis (COA) detailing parameters such as dye content, impurity profile, solubility, and spectral properties is provided with each shipment to guarantee it meets your specific application requirements.

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 sealed to prevent absorption of atmospheric moisture which may affect performance.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to structure
Dye Content	≥ 85% (or as per grade)
Moisture Content	≤ 5.0%
Water Solubility	Completely soluble
pH (1% Solution)	6.0 - 8.0
Ash Content	≤ 15.0%
Heavy Metals (as Pb)	≤ 20 ppm

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