Description

Disodium 7-[(4-Amino-5-Methoxy-o-Tolyl)Azo]Naphthalene-1,3-Disulphonate is a high-purity azo dye intermediate essential for producing vibrant and stable colorants. This compound matters for its role as a key precursor in synthesizing specialized dyes and pigments with excellent light and wash fastness properties. Industries such as textile manufacturing, ink production, and specialty chemical synthesis rely on this consistent-quality intermediate to ensure the performance of their final colored products. Our supply is backed by rigorous quality control to meet the demanding specifications of industrial-scale applications.

Application

• Primary Intermediate for Azo Dyes: Serves as a crucial building block in the synthesis of acid dyes, direct dyes, and reactive dyes used in textile coloring.
• Textile Industry: Used in the dyeing and printing of natural and synthetic fibers, including wool, silk, nylon, and paper.
• Ink Manufacturing: A key component in the formulation of inks for various printing applications, contributing to color strength and stability.
• Specialty Pigments: Employed in the production of pigments for plastics, coatings, and other industrial applications requiring specific color properties.
• Research & Development: Utilized in chemical research for developing new chromophores and studying azo coupling reactions.
• Biological Staining: Potential use as a staining agent in histological and microbiological applications due to its azo structure.

Basic Information

Product Name	Disodium 7-[(4-Amino-5-Methoxy-o-Tolyl)Azo]Naphthalene-1,3-Disulphonate
CAS No.	6341-28-2
Molecular Formula	C18H15N3Na2O7S2
Molecular Weight	495.43 g/mol
Synonyms	7-[(4-Amino-5-methoxy-2-methylphenyl)azo]naphthalene-1,3-disulfonic acid disodium salt; Acid Orange 33; C.I. 24780; Disodium 7-[(4-amino-5-methoxy-2-methylphenyl)azo]-1,3-naphthalenedisulfonate; 1,3-Naphthalenedisulfonic acid, 7-[(4-amino-5-methoxy-2-methylphenyl)azo]-, disodium salt; C.I. Acid Orange 33; Orange ASG; Amacid Orange T
EINECS	228-736-1

Quality Control

Our Disodium 7-[(4-Amino-5-Methoxy-o-Tolyl)Azo]Naphthalene-1,3-Disulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets high-purity standards and consistent performance for dye synthesis. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are available upon request to support your quality assurance and regulatory compliance 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). This product is hygroscopic (moisture-sensitive) and light-sensitive; therefore, containers must be kept tightly sealed after opening to minimize exposure to atmospheric moisture and light to maintain product integrity.

Specification

Item	Specification
Appearance	Orange to reddish-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
Water Solubility	Freely soluble

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