Description

Benzenesulfonic Acid, 2-Amino-5-(2-(4-Sulfophenyl)Diazenyl)-, Sodium Salt (1:) is a high-purity, water-soluble azo dye intermediate characterized by its distinct chemical structure. This compound is valued for its role in synthesizing vibrant and stable dyes and pigments, offering excellent color fastness and compatibility with various substrates. It is primarily utilized by manufacturers in the textile, ink, and specialty chemical industries seeking reliable intermediates for high-performance colorant production.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of acid dyes and direct dyes for textiles like wool, silk, and nylon.
• Pigment Manufacturing: Used in the production of organic pigments for inks, plastics, and coatings, providing strong color strength.
• Laboratory Research & Development: Employed as a standard or reagent in chemical research focused on dye chemistry and photophysical properties.
• Specialty Chemical Synthesis: Acts as a functional intermediate for creating more complex sulfonated aromatic compounds with specific industrial applications.
• Biological Staining: Potential use in the formulation of histological stains due to its chromophoric properties.

Basic Information

Product Name	Benzenesulfonic Acid, 2-Amino-5-(2-(4-Sulfophenyl)Diazenyl)-, Sodium Salt (1:)
CAS No.	79873-36-2
Molecular Formula	C18H13N4NaO6S2
Molecular Weight	460.43 g/mol
Synonyms	2-Amino-5-[(4-sulfophenyl)diazenyl]benzenesulfonic acid sodium salt; Acid Yellow 9 sodium salt (principal component); C.I. 13015; Sodium 2-amino-5-[(4-sulfophenyl)diazenyl]benzenesulfonate; 5-Amino-2-[(4-sulfophenyl)azo]benzenesulfonic acid sodium salt; 4-[(2-Sulfo-4-aminophenyl)azo]benzenesulfonic acid sodium salt; Azo dye intermediate YA
EINECS	Contact for details

Quality Control

Our production of Benzenesulfonic Acid, 2-Amino-5-(2-(4-Sulfophenyl)Diazenyl)-, Sodium Salt (1:) adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and meet the specifications required for high-end dye synthesis. Certificates of Analysis (COA) documenting all critical parameters 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 sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Orange to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	Contact for details
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.