Description

4-[(4-Amino-5-Methoxy-o-Tolyl)Azo]-5-Hydroxynaphthalene-2,7-Disulphonic Acid is a high-purity, synthetic azo dye intermediate of significant industrial importance. Its core value lies in its precise molecular structure, which is engineered to impart specific color and performance characteristics in advanced dye formulations. This compound is essential for manufacturers in the textile, ink, and specialty chemical sectors seeking reliable and consistent raw materials for producing high-quality colorants.

Application

• Primary intermediate in the synthesis of high-performance azo dyes and pigments for textiles and fabrics.
• Key precursor for manufacturing specialty inks, including those used in packaging and security printing.
• Used in the production of colorants for leather and paper products.
• Potential intermediate for research and development of novel functional dyes with specific optical properties.
• Employed in the formulation of industrial colorants for plastics and coatings.
• Serves as a chemical building block in organic synthesis for advanced chemical research.

Basic Information

Item	Detail
Product Name	4-[(4-Amino-5-Methoxy-o-Tolyl)Azo]-5-Hydroxynaphthalene-2,7-Disulphonic Acid
CAS No.	68084-16-2
Molecular Formula	C18H17N3O7S2
Molecular Weight	451.47 g/mol
Synonyms	Acid Red 337; C.I. 17210; 5-Hydroxy-4-[(4-amino-5-methoxy-2-methylphenyl)azo]-2,7-naphthalenedisulfonic acid; 2,7-Naphthalenedisulfonic acid, 4-[(4-amino-5-methoxy-2-methylphenyl)azo]-5-hydroxy-; 4-[(4-Amino-5-methoxy-2-methylphenyl)azo]-5-hydroxy-2,7-naphthalenedisulfonic acid; 4-[(4-Amino-5-methoxy-o-tolyl)azo]-5-hydroxynaphthalene-2,7-disulfonic acid
EINECS	Contact for details

Quality Control

Our production of 4-[(4-Amino-5-Methoxy-o-Tolyl)Azo]-5-Hydroxynaphthalene-2,7-Disulphonic Acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and reliability. The product undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to meet exacting customer specifications. A comprehensive Certificate of Analysis (COA) detailing all quality parameters is provided with every shipment 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm

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