Description

7-[(4-Amino-o-Tolyl)Azo]Naphthalene-1,3-Disulphonic Acid, Sodium Salt is a high-purity, water-soluble azo dye intermediate. This compound is valued for its role as a critical precursor in the synthesis of vibrant and stable dyes and pigments. It is primarily required by manufacturers in the textile, ink, and specialty chemical industries seeking to produce high-performance colorants.

Application

• Primary Intermediate for Azo Dyes: A key building block in the synthesis of acid dyes, direct dyes, and reactive dyes used for coloring textiles like wool, silk, and nylon.
• Pigment Manufacturing: Used in the production of organic pigments for inks, plastics, and coatings, offering good tinting strength and color fastness.
• Specialty Chemical Synthesis: Serves as a versatile intermediate for creating more complex chromophores and functional dyes used in research and high-tech applications.
• Laboratory Reagent: Employed in analytical chemistry and research as a standard or reagent for dye-related studies and method development.

Basic Information

Product Name	7-[(4-Amino-o-Tolyl)Azo]Naphthalene-1,3-Disulphonic Acid, Sodium Salt
CAS No.	68966-52-9
Molecular Formula	C17H14N4O6S2•xNa
Molecular Weight	Contact for details
Synonyms	7-[(4-Amino-2-methylphenyl)azo]naphthalene-1,3-disulfonic acid sodium salt; Acid Orange 156 intermediate; C.I. 26400 intermediate; 1,3-Naphthalenedisulfonic acid, 7-[(4-amino-2-methylphenyl)azo]-, sodium salt; Azo dye intermediate 68966-52-9; Sodium 7-[(4-amino-o-tolyl)azo]naphthalene-1,3-disulfonate
EINECS	Contact for details

Quality Control

Our production of 7-[(4-Amino-o-Tolyl)Azo]Naphthalene-1,3-Disulphonic Acid, Sodium Salt adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and compliance with customer specifications. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical characteristics is provided with each shipment.

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). This material is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed to prevent absorption of atmospheric moisture, which may affect product performance.

Specification

Item	Specification
Appearance	Orange to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0% (typical ≥ 98.0%)
Water Content	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Freely soluble

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