Description

7-Acetamido-4-Hydroxy-3-[(2-Sulphophenyl)Azo]Naphthalene-2-Sulphonic Acid, Sodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its value lies in its role as a key precursor for synthesizing vibrant and stable acid dyes and reactive dyes, particularly for textile applications. This compound is essential for manufacturers and R&D facilities in the dye and pigment, specialty chemical, and advanced material sectors seeking reliable, high-quality intermediates.

Application

• Primary Intermediate for Acid Dyes: Serves as a crucial building block in the synthesis of acid dyes used for coloring nylon, silk, wool, and modified acrylic fibers.
• Reactive Dye Synthesis: Used in the production of reactive dyes that form covalent bonds with cellulose fibers like cotton, ensuring excellent wash-fastness.
• Specialty Pigments and Inks: A key component in manufacturing high-performance pigments and inks for specialized printing applications.
• Biological Staining: Potential use as an intermediate for developing biological stains and histochemical dyes in laboratory settings.
• Research & Development: Employed in chemical research for studying azo coupling reactions and developing novel chromophores with specific optical properties.
• Analytical Reagents: Can be utilized in the formulation of pH indicators or other analytical reagents due to its color-changing properties.

Basic Information

Product Name	7-Acetamido-4-Hydroxy-3-[(2-Sulphophenyl)Azo]Naphthalene-2-Sulphonic Acid, Sodium Salt
CAS No.	83027-41-2
Molecular Formula	C18H13N3O8S2Na
Molecular Weight	486.43 g/mol
Synonyms	7-Acetamido-4-hydroxy-3-[(2-sulfophenyl)azo]naphthalene-2-sulfonic acid sodium salt; C.I. Acid Orange 156; Sodium 7-acetamido-4-hydroxy-3-[(2-sulfophenyl)azo]naphthalene-2-sulfonate; 7-Acetylamino-4-hydroxy-3-[(2-sulfophenyl)azo]-2-naphthalenesulfonic acid sodium salt; Acid Orange 156; Azo dye intermediate OA-156; 2-Naphthalenesulfonic acid, 7-(acetylamino)-4-hydroxy-3-[(2-sulfophenyl)azo]-, sodium salt (1:1)
EINECS	Contact for details

Quality Control

Our production of 7-Acetamido-4-Hydroxy-3-[(2-Sulphophenyl)Azo]Naphthalene-2-Sulphonic Acid, Sodium Salt adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and chemical composition. Certificates of Analysis (COA) detailing key specifications such as assay, impurity profile, and solubility are available upon request 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 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 stability and performance.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
pH (1% Solution)	6.0 - 8.0
Solubility in Water	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm

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