Description

Ammonium Sodium 6-Amino-4-Hydroxy-5-[(4-Nitro-2-Sulphonatophenyl)Azo]Naphthalene-2-Sulphonate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its primary value lies in its role as a key precursor for synthesizing specific, high-performance dyes and pigments, particularly those requiring a stable chromophore with multiple sulphonate groups for enhanced solubility and substantivity. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce vivid and durable colorants. The product is supplied with rigorous quality control to ensure batch-to-batch consistency for demanding industrial applications.

Application

• Primary Intermediate for Reactive Dyes: A crucial building block in the synthesis of reactive dyes for cotton and other cellulosic fibers, providing excellent wash-fastness.
• Production of Acid Dyes: Used in manufacturing acid dyes for wool, silk, and nylon, offering bright shades and good leveling properties.
• Specialty Pigment Synthesis: Serves as a precursor for creating high-performance organic pigments used in inks, plastics, and coatings.
• Laboratory & Research Chemical: Employed in R&D for developing new chromophores and studying azo dye chemistry and photostability.
• Textile Printing Inks: A key component in formulating specialized inks for digital and screen printing on textiles.
• Biological Staining Agent Precursor: Potential use in the synthesis of stains for histological and cytological applications.

Basic Information

Item	Details
Product Name	Ammonium Sodium 6-Amino-4-Hydroxy-5-[(4-Nitro-2-Sulphonatophenyl)Azo]Naphthalene-2-Sulphonate
CAS No.	83721-57-7
Molecular Formula	C16H13N5O10S2•Na•NH4 (or similar salt form)
Molecular Weight	Contact for details
Synonyms	6-Amino-4-hydroxy-5-[(4-nitro-2-sulfophenyl)azo]-2-naphthalenesulfonic acid, ammonium sodium salt; Azo dye intermediate 83721-57-7; C.I. Azoic Diazo Component (related); 5-[(4-Nitro-2-sulfophenyl)azo]-6-amino-4-hydroxy-2-naphthalenesulfonic acid ammonium sodium salt; 2-Naphthalenesulfonic acid, 6-amino-4-hydroxy-5-[(4-nitro-2-sulfophenyl)azo]-, ammonium sodium salt; Reactive dye intermediate; Acid dye precursor; Sodium ammonium naphthalene sulphonate azo compound
EINECS	Contact for details

Quality Control

Our production of Ammonium Sodium 6-Amino-4-Hydroxy-5-[(4-Nitro-2-Sulphonatophenyl)Azo]Naphthalene-2-Sulphonate adheres to a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and performance. Certificates of Analysis (COA) documenting key parameters such as assay, impurity profile, and solubility are available upon request. We are committed to supplying material that delivers consistent results in your synthesis 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 can affect product quality and handling properties. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark red to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Purity (HPLC Area %)	Min. 98.0%
Water Content (KF)	Max. 5.0%
Solubility (in Water)	Freely soluble
Heavy Metals (as Pb)	Max. 20 ppm
Related Substances (HPLC)	Individual unknown: Max. 0.5%; Total: Max. 2.0%

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