Description

[(4-Amino-o-Tolyl)Azo]Naphthalene-1,5-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 chemical industries for producing high-performance dyes and pigments.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of acid, direct, and reactive dyes, particularly for textile fibers like wool, silk, and nylon.
• Leather Dyeing: Used in the formulation of dyes for coloring leather goods, providing good penetration and color fastness.
• Paper Coloring: Employed in the production of dyes for specialty papers and packaging materials.
• Ink Manufacturing: A component in the synthesis of pigments for inks used in printing and packaging.
• Research & Development: Utilized in chemical research for developing new chromophores and studying azo coupling reactions.
• Specialty Chemical Synthesis: Acts as a precursor for more complex sulfonated aromatic compounds used in various chemical processes.

Basic Information

Product Name	[(4-Amino-o-Tolyl)Azo]Naphthalene-1,5-Disulphonic Acid, Sodium Salt
CAS No.	68400-80-6
Molecular Formula	C17H14N4O6S2•Na2 (or related sodium salt form)
Molecular Weight	Contact for details
Synonyms	1,5-Naphthalenedisulfonic acid, 2-[(2-amino-5-methylphenyl)azo]-, sodium salt (1:2); Acid Red 337 (related dye class); C.I. 17210; Sodium 2-[(2-amino-5-methylphenyl)azo]naphthalene-1,5-disulfonate; 2-[(2-Amino-5-methylphenyl)azo]-1,5-naphthalenedisulfonic acid disodium salt; Azo dye intermediate 68400-80-6; 4-Amino-2-methylazobenzene-2',5'-disulfonic acid disodium salt
EINECS	Contact for details

Quality Control

Our production of [(4-Amino-o-Tolyl)Azo]Naphthalene-1,5-Disulphonic 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 assay, impurity profile, and physical specifications 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.

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)	Clear solution
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 3.0%

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