Description

2-[[1-Amino-7-[[5-[(4,6-Dichloro-1,3,5-Triazin-2-Yl)Amino]-2-Sulphophenyl]Azo]-8-Hydroxy-3,6-Disulpho-2-Naphthyl]Azo]Naphthalene-1,5-Disulphonic Acid CAS NO 64253-81-2 is a high-purity, polyfunctional reactive dye intermediate characterized by its complex, multi-sulfonated aromatic structure. This compound is engineered to deliver exceptional color strength and covalent bonding properties in demanding industrial applications. It is primarily required by manufacturers in the textile, leather, and specialty chemical sectors for producing high-performance, wash-fast dyes and pigments.

Application

• Reactive Dye Synthesis: A key intermediate for manufacturing high-grade reactive dyes used in cotton, wool, and nylon dyeing and printing.
• Textile Industry: Imparts brilliant, covalent-bonded hues with excellent wet fastness, lightfastness, and wash durability.
• Leather Processing: Used in the production of dyes for leather coloring, offering deep penetration and color uniformity.
• Paper Coloration: Employed in the manufacture of dyes for specialty paper products requiring vibrant and stable colors.
• Ink Formulation: Serves as a precursor for pigments in inks where high color value and stability are critical.
• Research & Development: Utilized in chemical R&D for synthesizing novel chromophores and studying azo dye chemistry.

Basic Information

Product Name	2-[[1-Amino-7-[[5-[(4,6-Dichloro-1,3,5-Triazin-2-Yl)Amino]-2-Sulphophenyl]Azo]-8-Hydroxy-3,6-Disulpho-2-Naphthyl]Azo]Naphthalene-1,5-Disulphonic Acid
CAS No.	64253-81-2
Molecular Formula	C29H16Cl2N10O16S6
Molecular Weight	1087.78 g/mol
Synonyms	Reactive Black 5 Intermediate; C.I. Reactive Black 5 (precursor); 1,5-Naphthalenedisulfonic acid, 2-[[1-amino-7-[[5-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]-2-sulfophenyl]azo]-8-hydroxy-3,6-disulfo-2-naphthyl]azo]-; Remazol Black B Intermediate; Polyazo dye intermediate; Tetrasulfonated azo-triazine compound; Azo reactive dye intermediate
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and performance reliability. Quality is verified through comprehensive analytical methods including HPLC, UV-Vis spectroscopy, and titration to confirm purity, strength, and the absence of critical impurities. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting all relevant 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 (moisture-sensitive) nature, the container must be kept sealed when not in use to prevent moisture absorption, which can affect product performance and handling.

Specification

Item	Specification
Appearance	Dark blue to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 90% (typical 92-97%)
Moisture Content	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 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.