Description

2,7-Naphthalenedisulfonic Acid, 4-[(4-Amino-2-Hydroxyphenyl)Azo]-5-Hydroxy-, Coupled With Diazotized 2-Amino-4,6-Dinitrophenol, Sodium Salts is a high-purity, complex azo dye intermediate. This compound is valued for its precise chemical structure, which is critical for producing consistent and vibrant colorants in demanding applications. It is primarily required by manufacturers in the textile, ink, and specialty chemical industries for synthesizing high-performance dyes and pigments.

Application

• Primary Intermediate for Azo Dyes: A key building block in the synthesis of high-quality, complex azo dyes for textiles, leather, and paper.
• Specialty Ink Formulation: Used in the production of pigments for inks requiring specific color fastness and stability, including packaging and security inks.
• Functional Dye Synthesis: Serves as a precursor for dyes used in non-textile applications, such as colorants for plastics and coatings.
• Research & Development: Employed in chemical R&D for developing novel chromophores and studying structure-property relationships in dye chemistry.
• Analytical Chemistry: Can be utilized as a standard or reagent in analytical methods for dye identification and quantification.

Basic Information

Product Name	2,7-Naphthalenedisulfonic Acid, 4-[(4-Amino-2-Hydroxyphenyl)Azo]-5-Hydroxy-, Coupled With Diazotized 2-Amino-4,6-Dinitrophenol, Sodium Salts
CAS No.	91671-94-2
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Pigment Brown 44; 2,7-Naphthalenedisulfonic acid, 4-[(4-amino-2-hydroxyphenyl)azo]-5-hydroxy-, coupled with diazotized 2-amino-4,6-dinitrophenol, sodium salts; Pigment Brown 44; Sodium 4-[(4-amino-2-hydroxyphenyl)azo]-5-hydroxy-2,7-naphthalenedisulfonate coupled with diazotized 2-amino-4,6-dinitrophenol
EINECS	Contact for details

Quality Control

Our products undergo rigorous quality testing to ensure compliance with industry standards. Every batch is controlled against stringent specifications for identity, purity, and composition to guarantee batch-to-batch consistency for your synthesis processes. Certificates of Analysis (COA) are available upon request.

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 to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark brown to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Heavy Metals	≤ 20 ppm
Water Solubility	Freely soluble

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