Description

3-[(4-Amino-5-Methoxy-o-Tolyl)Azo]Naphthalene-1,5-Disulphonic Acid is a high-purity, synthetic azo dye intermediate of significant industrial importance. Its value lies in its role as a key precursor for producing vibrant and stable dyes and pigments, particularly in the red to violet color spectrum. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to develop high-performance colorants with excellent fastness properties.

Application

• Primary Intermediate for Azo Dyes & Pigments: Serves as the core building block in the synthesis of high-grade, metal-complex and disperse dyes used for coloring synthetic fibers like polyester and nylon.
• Textile Dye Manufacturing: Used to produce dyes with applications in textile printing and dyeing, valued for their color strength and wash-fastness.
• Inkjet and Printing Ink Formulation: A crucial component in the manufacture of pigments for high-quality inks, including those used in digital textile printing and packaging.
• Specialty Chemical Synthesis: Acts as an intermediate in the production of more complex colorants and functional chemicals used in research and advanced material science.
• Liquid Crystal Display (LCD) Color Filters: Potential application in the synthesis of dyes for color filters in electronic displays, where purity and performance are critical.

Basic Information

Product Name	3-[(4-Amino-5-Methoxy-o-Tolyl)Azo]Naphthalene-1,5-Disulphonic Acid
CAS No.	61827-75-6
Molecular Formula	C18H16N4O7S2
Molecular Weight	464.47 g/mol
Synonyms	Acid Red 337; C.I. 17210; 1,5-Naphthalenedisulfonic acid, 3-[(4-amino-5-methoxy-2-methylphenyl)azo]-; 3-[(4-Amino-5-methoxy-2-methylphenyl)azo]-1,5-naphthalenedisulfonic acid; 4-Amino-5-methoxy-o-tolylazonaphthalene-1,5-disulfonic acid; 3-[(4-Amino-5-methoxy-2-methylphenyl)hydrazinylidene]naphthalene-1,5-disulfonic acid
EINECS	Contact for details

Quality Control

Our production of 3-[(4-Amino-5-Methoxy-o-Tolyl)Azo]Naphthalene-1,5-Disulphonic Acid 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. Certificates of Analysis (COA) detailing assay, impurity profile, and physical characteristics are provided to guarantee traceability and product integrity for your manufacturing 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 sealed to prevent absorption of atmospheric moisture, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Dark red to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0% (Typical 97-99%)
Water Content (KF)	≤ 5.0%
Sulfated Ash	≤ 1.0%
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.