Description

Disodium 4-Hydroxy-3-[(2-Methoxyphenyl)Azo]Naphthalene-2,7-Disulphonate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its primary value lies in its role as a key precursor for synthesizing a range of 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 coatings industries who require consistent quality and reliable supply for their production processes. The CAS number for this compound is 5858-63-9.

Application

• Primary Dye & Pigment Synthesis: Acts as a crucial intermediate for manufacturing acid dyes, direct dyes, and reactive dyes used extensively in textile coloring.
• Inkjet Inks: Utilized in the formulation of high-performance inks for digital and industrial printing, providing excellent color strength and stability.
• Paper Coloring: Employed in the production of colored papers and paper products where water-fastness is required.
• Leather Dyeing: Used in the tanning industry to impart durable and uniform color to leather goods.
• Biological Staining: Finds application in histology and microscopy as a staining agent for cellular and tissue analysis.
• Research & Development: Serves as a standard or starting material in chemical research for developing new chromophores and functional materials.

Basic Information

Product Name	Disodium 4-Hydroxy-3-[(2-Methoxyphenyl)Azo]Naphthalene-2,7-Disulphonate
CAS No.	5858-63-9
Molecular Formula	C17H12N2Na2O8S2
Molecular Weight	474.39 g/mol
Synonyms	Acid Red 246; C.I. 17015; Disodium 4-hydroxy-3-(2-methoxyphenyl)azo)naphthalene-2,7-disulfonate; 2,7-Naphthalenedisulfonic acid, 4-hydroxy-3-((2-methoxyphenyl)azo)-, disodium salt; 2-Naphthol Red; Mordant Red; Azo Rubine
EINECS	227-476-2

Quality Control

Our production of Disodium 4-Hydroxy-3-[(2-Methoxyphenyl)Azo]Naphthalene-2,7-Disulphonate adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and industry standards. A detailed Certificate of Analysis (COA) documenting assay, impurity profile, and physical properties is provided with each shipment to guarantee traceability and consistency.

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). Keep away from heat sources and 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 red powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 30.0%
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.