Description

2,7-Naphthalenedisulfonic acid, 5-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-4-hydroxy-3-[[4'-[(2-hydroxy-3,6-disulfo-1-naphthalenyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-, tetrasodium salt is a high-purity, complex azo dye intermediate designed for demanding industrial applications. This compound is valued for its ability to impart a specific, stable colorant structure, making it a critical component in the synthesis of high-performance dyes and pigments. It is primarily sought by manufacturers in the textile, ink, and specialty coatings industries who require consistent quality and reliable supply for their production processes.

Application

• Textile Dyeing: As a key intermediate for synthesizing reactive and direct dyes for cotton, wool, and nylon fibers.
• Ink Manufacturing: Used in the production of high-quality printing inks, including those for packaging and security applications.
• Industrial Pigments: Serves as a precursor for creating organic pigments used in plastics, paints, and coatings.
• Leather Coloring: Employed in the formulation of dyes for the leather tanning and finishing industry.
• Paper Coloring: Used in the manufacture of dyes for specialty and decorative papers.
• Research & Development: Serves as a standard or building block in chemical research for developing new colorant molecules.

Basic Information

Product Name	2,7-Naphthalenedisulfonic acid, 5-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-4-hydroxy-3-[[4'-[(2-hydroxy-3,6-disulfo-1-naphthalenyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-, tetrasodium salt
CAS No.	66214-47-9
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Reactive Black 5; Tetrasodium 4-amino-5-hydroxy-3-[[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-6-(phenylazo)naphthalene-2,7-disulfonate; Reactive Black 5; Remazol Black B; Lanasol Black B; Sumifix Supra Black B; Drimarene Black B; CAS 17095-24-8 (for the parent acid form, often referenced).
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 purity for industrial synthesis. Each lot is analyzed against established specifications, including identity confirmation, assay, and impurity profile. A Certificate of Analysis (COA) detailing these results is provided with every shipment to support your quality assurance and regulatory compliance 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). Due to its hygroscopic nature, the container must be kept tightly sealed to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 90%
Moisture Content	Max. 5.0%
Water Solubility	Freely soluble
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.