Description

2,7-Naphthalenedisulfonic acid, 5-[[4-chloro-6-[[3-[[4-chloro-6-[(3-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]-6-sulfophenyl]amino]-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[(2-sulfophenyl)azo]-, pentasodium salt is a high-purity, complex azo dye intermediate and reactive dye precursor. This compound is valued for its ability to impart strong, vibrant colors with excellent wash and light fastness properties when incorporated into polymeric matrices. It is primarily needed by manufacturers in the textile, specialty ink, and advanced materials sectors seeking to produce high-performance dyes and pigments.

Application

• Reactive Dye Synthesis: A key intermediate for manufacturing high-quality reactive dyes used in cotton, wool, and nylon fiber dyeing and printing.
• Textile Industry: Used in the production of dyes that offer superior color strength, brightness, and durability on cellulosic and synthetic fabrics.
• Specialty Inks: Serves as a colorant precursor for inks requiring high stability and color fidelity, such as those used in security printing and packaging.
• Functional Pigments: Can be utilized in the development of pigments for coatings and plastics where specific color and performance characteristics are required.
• Research & Development: Employed in chemical research for synthesizing novel chromophores and studying dye-polymer interactions.
• Analytical Chemistry: May be used as a standard or reagent in colorimetric analysis and detection methods.

Basic Information

Item	Details
Product Name	2,7-Naphthalenedisulfonic acid, 5-[[4-chloro-6-[[3-[[4-chloro-6-[(3-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]-6-sulfophenyl]amino]-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[(2-sulfophenyl)azo]-, pentasodium salt
CAS No.	6058-62-4
Molecular Formula	C34H18Cl2N12O16S5·5Na
Molecular Weight	Contact for details
Synonyms	Reactive Black 5 (principal commercial form); C.I. 20505; Remazol Black B; Lanasol Black B; Drimarene Black B; Sumifix Black B; Pentasodium 5-[[4-chloro-6-[[3-[[4-chloro-6-[(3-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]-6-sulfophenyl]amino]-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[(2-sulfophenyl)azo]naphthalene-2,7-disulfonate
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and performance reliability. Quality is verified through comprehensive analytical testing, including HPLC for purity and impurity profiling and spectrophotometric analysis for color strength. A detailed Certificate of Analysis (COA) is provided with each shipment, confirming compliance with agreed specifications.

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 to prevent moisture absorption, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Color Strength	100% ± 3% (vs. Standard)
Moisture Content	Max. 5.0%
Water Solubility	Completely soluble
Heavy Metals (as Pb)	Max. 20 ppm
pH (1% Solution)	6.0 - 8.0

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