Description

Disodium 3-[(4-Amino-5-Methoxy-o-Tolyl)Azo]Naphthalene-1,5-Disulphonate is a high-purity azo dye intermediate characterized by its disulphonate salt structure, which enhances its water solubility and stability. This compound is critical for manufacturers requiring precise colorant synthesis with excellent batch-to-batch consistency and reliable supply chains. It is primarily utilized by producers of dyes and pigments for textiles, inks, and specialty coatings.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of red and violet azo dyes for textile fibers, including cotton, wool, and nylon.
• Pigment Manufacturing: Used in the production of high-performance organic pigments for industrial inks and coatings.
• Specialty Colorants: Employed in the formulation of colorants for specialty applications such as paper, leather, and food contact materials where specific purity standards are required.
• Research & Development: A valuable chemical for R&D laboratories focusing on novel chromophore development and dye chemistry studies.

Basic Information

Product Name	Disodium 3-[(4-Amino-5-Methoxy-o-Tolyl)Azo]Naphthalene-1,5-Disulphonate
CAS No.	67875-30-3
Molecular Formula	C18H15N3Na2O7S2
Molecular Weight	503.43 g/mol
Synonyms	Acid Red 337 (disodium salt); C.I. 17210; 3-[(4-Amino-5-methoxy-2-methylphenyl)azo]-1,5-naphthalenedisulfonic acid, disodium salt; 1,5-Naphthalenedisulfonic acid, 3-[(4-amino-5-methoxy-2-methylphenyl)azo]-, disodium salt; Disodium 3-[(4-amino-5-methoxy-2-methylphenyl)azo]naphthalene-1,5-disulfonate; Azo dye intermediate 67875-30-3; 4-Amino-5-methoxy-o-tolyl azo naphthalene disulfonate
EINECS	Contact for details

Quality Control

Our Disodium 3-[(4-Amino-5-Methoxy-o-Tolyl)Azo]Naphthalene-1,5-Disulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets the high standards required for sensitive dye synthesis. Certificates of Analysis (COA) detailing all specifications are provided with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from incompatible materials. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear solution

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