Description

N-[5-[(7-Amino-1-hydroxy-3-sodiosulfo-2-naphthalenyl)azo]-2-[[4'-[(7-amino-1-hydroxy-3-sodiosulfo-2-naphthalenyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]phenyl]oxamidic acid sodium salt is a high-purity, complex azo dye intermediate. This compound is valued for its ability to impart specific color properties and act as a key building block in the synthesis of advanced dyes and pigments. It is primarily required by manufacturers in the textile, ink, and specialty chemical industries seeking consistent performance and batch-to-batch uniformity.

Application

• Primary Intermediate for Polyazo Dyes: Serves as a critical precursor in the synthesis of high-grade, deep-shade polyazo dyes for textiles like cotton and wool.
• Specialty Ink Formulations: Used in the production of colorants for high-performance inks, including those for packaging and security printing.
• Functional Pigment Synthesis: Acts as a key component in creating complex organic pigments with enhanced lightfastness and thermal stability.
• Research & Development: Employed in chemical R&D for developing novel chromophores and studying azo dye chemistry and properties.
• Analytical Chemistry: Can be utilized as a standard or reagent in specific colorimetric analytical methods.

Basic Information

Item	Detail
Product Name	N-[5-[(7-Amino-1-hydroxy-3-sodiosulfo-2-naphthalenyl)azo]-2-[[4'-[(7-amino-1-hydroxy-3-sodiosulfo-2-naphthalenyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]phenyl]oxamidic acid sodium salt
CAS No.	7237-46-9
Molecular Formula	C48H34N10Na4O18S4
Molecular Weight	~1298.1 g/mol (Contact for exact details)
Synonyms	Direct Black 22 (C.I. 35435); Sodium 4-amino-5-hydroxy-3-[[4'-[2-(7-amino-1-hydroxy-3-sulphonato-2-naphthyl)hydrazinyl]-3,3'-dimethoxybiphenyl-4-yl]hydrazinyl]-6-(2-(7-amino-1-hydroxy-3-sulphonato-2-naphthyl)hydrazinyl)naphthalene-2,7-disulphonate; Oxamic acid, N-[5-[(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo]-2-[[4'-[(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]phenyl]-, sodium salt; Azo dye intermediate 7237-46-9; Tetrasodium salt of a polyazo oxamic acid derivative.
EINECS	Contact for details

Quality Control

Our production of this advanced intermediate adheres to strict quality control protocols to ensure chemical integrity and performance consistency. Each batch is analyzed using modern analytical techniques, including HPLC and spectrophotometry, to verify identity, purity, and critical impurity profiles. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment to support your quality assurance processes.

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 (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which could affect product 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%
Solubility (Water)	Soluble, clear solution
Heavy Metals (as Pb)	≤ 20 ppm

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