1,5-Naphthalenedisulfonic acid, 3-[[4-[[4-[[3-[[[4-[(4,8-disulfo-2-naphthalenyl)azo]-2-methoxy-5-methylphenyl]amino]carbonyl]-4-methoxyphenyl]azo]benzoyl]amino]-5-methoxy-2-methylphenyl]azo]-, tetrapotassium salt CAS NO 25746-43-4

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CAS No.:25746-43-4

Grade:Pharmacy Grade

Content:99.9%

Brand:Customizable

Packaging:Customizable

Description

1,5-Naphthalenedisulfonic acid, 3-[[4-[[4-[[3-[[[4-[(4,8-disulfo-2-naphthalenyl)azo]-2-methoxy-5-methylphenyl]amino]carbonyl]-4-methoxyphenyl]azo]benzoyl]amino]-5-methoxy-2-methylphenyl]azo]-, tetrapotassium salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its complex polyazo structure, featuring multiple sulfonate groups, provides excellent substantivity and chromophoric properties, making it a critical precursor for the synthesis of specialized dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce vivid, wash-fast colors.

Application

Primary Intermediate for Reactive Dyes: Key building block for synthesizing high-grade reactive dyes used in cotton and cellulose fiber dyeing.
Direct Dye Production: Used in the manufacture of direct dyes for paper, leather, and textile applications requiring strong anionic character.
Specialty Pigment Synthesis: Serves as a precursor for creating complex, high-performance organic pigments used in inks and coatings.
Functional Dye Manufacturing: Employed in the production of dyes for non-textile uses, such as lasers, optical media, and biomedical staining.
Research & Development: Used in chemical R&D for developing new chromophores and studying azo dye chemistry and properties.

Basic Information

Item	Detail
Product Name	1,5-Naphthalenedisulfonic acid, 3-[[4-[[4-[[3-[[[4-[(4,8-disulfo-2-naphthalenyl)azo]-2-methoxy-5-methylphenyl]amino]carbonyl]-4-methoxyphenyl]azo]benzoyl]amino]-5-methoxy-2-methylphenyl]azo]-, tetrapotassium salt
CAS No.	25746-43-4
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Direct Yellow 106; Tetrapotassium 3,3'-[carbonylbis[[4-[(4,8-disulfo-2-naphthyl)azo]-2-methoxy-5-methylphenyl]imino]carbonyl[4,1-phenylene]azo[5-methoxy-2-methyl-4,1-phenylene]azo]]bis[1,5-naphthalenedisulfonate]; Direct Yellow 106, potassium salt; C.I. 40045; 1,5-Naphthalenedisulfonic acid, 3,3'-[carbonylbis[[4-[(4,8-disulfo-2-naphthyl)azo]-2-methoxy-5-methylphenyl]imino]carbonyl[4,1-phenylene]azo[5-methoxy-2-methyl-4,1-phenylene]azo]]bis-, tetrapotassium salt
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to stringent quality protocols to ensure batch-to-batch consistency and performance reliability. Quality is verified through comprehensive analytical testing, including HPLC for purity and identity confirmation. A Certificate of Analysis (COA) detailing assay, impurity profile, and physical specifications is provided with each 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, well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product performance and handling.

Specification

Item	Specification
Appearance	Dark brown to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	Max. 20 ppm