Description

8-[(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 in synthesizing vibrant and stable colorants for demanding industrial applications. It is primarily required by manufacturers in the textile, leather, and specialty ink industries for producing high-performance dyes and pigments.

Application

• Primary Dye Intermediate: A key precursor in the synthesis of acid dyes and direct dyes for textile fibers like wool, silk, and nylon.
• Leather Coloring: Used in the formulation of dyes for high-quality leather finishing, offering good penetration and color fastness.
• Ink Manufacturing: Employed in the production of specialty inks, including those for packaging and security printing applications.
• Paper Dyeing: Suitable for coloring paper products where specific shade and brightness are required.
• Research & Development: Serves as a valuable building block in chemical research for developing new chromophores and functional materials.

Basic Information

Product Name	8-[(4-Amino-o-Tolyl)Azo]Naphthalene-1,3-Disulphonic Acid, Sodium Salt
CAS No.	68109-68-2
Molecular Formula	C17H14N4O6S2•Na2 (or similar salt form)
Molecular Weight	Contact for details
Synonyms	Acid Red 337 (related dye class); 1,3-Naphthalenedisulfonic acid, 8-[(2-amino-5-methylphenyl)azo]-, disodium salt; 8-[(2-Amino-5-methylphenyl)azo]-1,3-naphthalenedisulfonic acid disodium salt; C.I. 17170; Azo dye intermediate for Acid Red; Sodium 8-[(4-amino-2-methylphenyl)diazenyl]naphthalene-1,3-disulfonate
EINECS	Contact for details

Quality Control

Our production of 8-[(4-Amino-o-Tolyl)Azo]Naphthalene-1,3-Disulphonic Acid, Sodium Salt adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing to ensure consistent purity, color strength, and chemical composition. Certificates of Analysis (COA) documenting key parameters such as assay, impurity profile, and solubility are available upon request to support your quality assurance 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). This material is hygroscopic (moisture-sensitive); ensure the container is kept sealed to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Dark red to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95% (typical)
Moisture Content	≤ 5.0%
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.