Description

7-(4-Amino-3-Methoxyphenylazo)-1,3-Naphthalenedisulfonic Acid is a high-purity, synthetic azo dye intermediate characterized by its disulfonic acid functional groups. This compound is essential for producing vibrant and stable colorants, offering excellent water solubility and coupling properties for downstream synthesis. It is primarily required by manufacturers in the dye and pigment industry, as well as by research institutions developing advanced functional materials and analytical reagents.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of acid dyes, direct dyes, and reactive dyes for textiles, leather, and paper.
• Pigment Manufacturing: Used in the production of lake pigments and other colorants requiring high tintorial strength and stability.
• Research & Development: Employed in chemical research for studying azo coupling reactions and developing new chromophores with specific optical properties.
• Specialty Chemicals: Potential use in the formulation of inks, coatings, and other specialty products where water-soluble colorants are needed.
• Analytical Reagents: Can be utilized as a staining agent or indicator in certain analytical and biological staining protocols.

Basic Information

Item	Details
Product Name	7-(4-Amino-3-Methoxyphenylazo)-1,3-Naphthalenedisulfonic Acid
CAS No.	63182-23-0
Molecular Formula	C17H15N3O7S2
Molecular Weight	437.45 g/mol
Synonyms	1,3-Naphthalenedisulfonic acid, 7-[(4-amino-3-methoxyphenyl)azo]-; C.I. 37020; 7-(4-Amino-3-methoxy-phenylazo)-naphthalene-1,3-disulfonic acid; 4-Amino-3-methoxybenzeneazohydroxynaphthalenedisulfonic Acid; Azoic Diazo Component 44; Variamine Blue B Salt; Azoic Diazo 44
EINECS	Contact for details

Quality Control

Our 7-(4-Amino-3-Methoxyphenylazo)-1,3-Naphthalenedisulfonic Acid is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. Certificates of Analysis (COA) documenting key parameters such as assay, impurity profile, and physical properties are provided and available upon request to support your quality assurance protocols.

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 nature, the container must be kept tightly sealed to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Dark brown to purple powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Solubility	Soluble in water, alkaline solutions

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