Description

5-[[4-[[4-[[6-[(4-Aminobenzoyl)Amino]-1-Hydroxy-3-Sulfo-2-Naphthalenyl]Azo]-2-Methylphenyl]Azo]Benzoyl]Amino]-2-Hydroxybenzoic Acid Disodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. This compound is valued for its role in synthesizing specialized dyes and pigments with excellent color fastness and specific optical properties. It is primarily required by manufacturers in the textile, ink, and specialty chemical industries for producing high-performance colorants.

Application

• Primary Intermediate for Azo Dyes: Key starting material for the synthesis of acid dyes, direct dyes, and reactive dyes used in textile coloring.
• Specialty Ink Formulations: Used in the production of high-quality inks for packaging, security printing, and digital applications.
• Functional Pigment Synthesis: Serves as a precursor for pigments with specific light-fastness and weather resistance properties.
• Research & Development: Utilized in chemical R&D for developing novel chromophores and studying dye-polymer interactions.
• Analytical Chemistry: Can be employed as a reagent or standard in chromatographic and spectroscopic analysis of dye compounds.

Basic Information

Product Name	5-[[4-[[4-[[6-[(4-Aminobenzoyl)Amino]-1-Hydroxy-3-Sulfo-2-Naphthalenyl]Azo]-2-Methylphenyl]Azo]Benzoyl]Amino]-2-Hydroxybenzoic Acid Disodium Salt
CAS No.	72379-62-5
Molecular Formula	C38H26N6Na2O10S
Molecular Weight	804.69 g/mol
Synonyms	Acid Yellow 219 (C.I. 13951); Benzoic acid, 5-[[4-[[4-[[6-[(4-aminobenzoyl)amino]-1-hydroxy-3-sulfo-2-naphthalenyl]azo]-2-methylphenyl]azo]benzoyl]amino]-2-hydroxy-, disodium salt; C.I. 13951; Disodium 5-({4-[(4-{[6-({4-[(carboxy)carbonyl]amino}phenyl)carbamoyl]-5-hydroxy-7-sulfo-2-naphthyl}diazenyl)-3-methylphenyl]diazenyl}benzamido)-2-hydroxybenzoate; Dye Intermediate 72379-62-5; Azo Dye Intermediate Yellow 219
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot is tested against comprehensive specifications using advanced analytical techniques including HPLC and spectrophotometry. A Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every shipment to support your quality assurance protocols.

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 tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Yellow to Orange-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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