Description

3-[[4-[[8-(benzoylamino)-1-hydroxy-3,6-disulpho-2-naphthyl]azo]-2,5-dimethoxyphenyl]azo]-4-hydroxy-5-[[4-(methylsulphonyl)benzoyl]amino]naphthalene-2,7-disulphonic acid is a high-purity, complex azo dye intermediate of significant commercial importance. Its value lies in its ability to impart specific, vibrant colors and functional properties to advanced materials. This compound is essential for manufacturers in the textile, ink, and specialty polymer industries seeking consistent, high-performance colorants.

Application

• Textile Dyeing: A key intermediate for synthesizing high-grade, wash-fast reactive and acid dyes for natural and synthetic fibers like cotton, wool, and nylon.
• Ink Manufacturing: Used in the production of high-quality pigments for industrial inks, including those for packaging, security printing, and digital applications.
• Functional Polymers: Serves as a chromophore in the development of colored engineering plastics and specialty polymers where color stability is critical.
• Research & Development: A vital building block for chemical research in novel dye structures, photonic materials, and sensor technologies.
• Leather Coloring: Employed in the formulation of durable dyes for the leather tanning and finishing industry.
• Paper Coloring: Used in the manufacture of dyes for high-grade paper products requiring specific color properties.

Basic Information

Product Name	3-[[4-[[8-(benzoylamino)-1-hydroxy-3,6-disulpho-2-naphthyl]azo]-2,5-dimethoxyphenyl]azo]-4-hydroxy-5-[[4-(methylsulphonyl)benzoyl]amino]naphthalene-2,7-disulphonic acid
CAS No.	31675-93-1
Molecular Formula	C43H30N6O18S4
Molecular Weight	1047.0 g/mol
Synonyms	Acid Black 210; C.I. 300310; Disodium 3-[[4-[[8-(benzoylamino)-1-hydroxy-3,6-disulfo-2-naphthyl]azo]-2,5-dimethoxyphenyl]azo]-4-hydroxy-5-[[4-(methylsulfonyl)benzoyl]amino]-2,7-naphthalenedisulfonate; Reactive Black 5 related intermediate; Azo dye intermediate 31675-93-1; Tetrasulfonated azo dye precursor; 1-Hydroxy-8-[(2,5-dimethoxy-4-[(4-hydroxy-5-[(4-(methylsulfonyl)benzoyl]amino]-2,7-disulfo-3-naphthyl)azo]phenyl)azo]-3,6-naphthalenedisulfonic acid, benzoylated
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. Quality is verified through comprehensive analytical methods including HPLC, spectrophotometry, and titration. A Certificate of Analysis (COA) detailing purity, identity, 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 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 stability and performance.

Specification

Item	Specification
Appearance	Dark blue to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in water)	Completely soluble

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