Description

2,7-Naphthalenedisulfonic acid, 5-[[4-[bis(2-hydroxyethyl)amino]-6-[[5-hydroxy-6-[(4-methoxy-2-sulfophenyl)azo]-7-sulfo-2-naphthalenyl]amino]-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[(2-sulfophenyl)azo]-, pentasodium salt is a high-purity, water-soluble anionic dye intermediate belonging to the class of reactive azo dyes. This compound is engineered for exceptional color strength and binding affinity, making it a critical component for producing vibrant and wash-fast colors. It is primarily utilized by manufacturers in the textile, leather, and specialty ink industries seeking reliable and consistent dye precursors for demanding applications.

Application

• Reactive Dye Synthesis: A key intermediate for manufacturing high-performance reactive dyes used in cotton, wool, and nylon dyeing and printing.
• Textile Industry: Imparts bright, durable shades with excellent fastness properties to light, washing, and perspiration.
• Leather Coloring: Used in the production of dyes for coloring leather goods, providing deep, uniform penetration and color stability.
• Inkjet Inks: Serves as a colorant precursor in the formulation of specialty inks for digital textile printing.
• Paper Dyeing: Employed in the coloring of specialty papers requiring high color value and stability.
• Research & Development: Used in chemical R&D for developing new chromophores and studying dye-polymer interactions.

Basic Information

Product Name	2,7-Naphthalenedisulfonic acid, 5-[[4-[bis(2-hydroxyethyl)amino]-6-[[5-hydroxy-6-[(4-methoxy-2-sulfophenyl)azo]-7-sulfo-2-naphthalenyl]amino]-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[(2-sulfophenyl)azo]-, pentasodium salt
CAS No.	82457-21-4
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Reactive Black 5, Pentasodium Salt; Reactive Black 5; Remazol Black B; Lanasol Black B; C.I. 20505; 2,7-Naphthalenedisulfonic acid, 5-[[4-[bis(2-hydroxyethyl)amino]-6-[[5-hydroxy-6-[(4-methoxy-2-sulfophenyl)azo]-7-sulfo-2-naphthalenyl]amino]-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[(2-sulfophenyl)azo]-, sodium salt (1:5); Reactive Dye Intermediate Black 5
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 advanced analytical techniques including HPLC and spectrophotometry. A comprehensive Certificate of Analysis (COA) detailing purity, strength, and impurity profiles is provided with every shipment to support your quality assurance and regulatory 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). This product is hygroscopic (moisture-sensitive); keep the container tightly sealed when not in use 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
Assay (HPLC)	Min. 95%
Color Strength	100% ± 3% (vs. Standard)
Moisture Content	Max. 5.0%
Water Solubility	Completely soluble
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	Max. 20 ppm

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