Description

Disodium 6-Hydroxy-5-(2-Methoxy-5-Methyl-4-Sulfonato-Phenyl)Diazenyl-Naphthalene-2-Sulfonate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its value lies in its role as a critical precursor for synthesizing vibrant and stable dyes and pigments, particularly in the red and orange color spectra. 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.

Application

• Primary intermediate for the synthesis of azo dyes and pigments, especially for red and orange hues.
• Key raw material in the production of textile dyes for cotton, wool, and synthetic fibers.
• Used in manufacturing inks for packaging, printing, and digital applications.
• Component in the formulation of specialty coatings and paints requiring specific color properties.
• Potential use in the coloration of paper and leather products.
• Research and development of novel functional colorants and advanced materials.

Basic Information

Product Name	Disodium 6-Hydroxy-5-(2-Methoxy-5-Methyl-4-Sulfonato-Phenyl)Diazenyl-Naphthalene-2-Sulfonate
CAS No.	66813-73-8
Molecular Formula	C18H14N2Na2O9S2
Molecular Weight	528.41 g/mol
Synonyms	Disodium 6-Hydroxy-5-[(2-Methoxy-5-Methyl-4-Sulfophenyl)Azo]-2-Naphthalenesulfonate; C.I. Acid Red 249; Acid Red 249; 6-Hydroxy-5-[(2-Methoxy-5-Methyl-4-Sulfophenyl)Azo]-2-Naphthalenesulfonic Acid, Disodium Salt; 2-Naphthalenesulfonic Acid, 6-Hydroxy-5-[(2-Methoxy-5-Methyl-4-Sulfophenyl)Azo]-, Disodium Salt; Azo Dye Intermediate Red 249; C.I. 18134
EINECS	Contact for details

Quality Control

Our production of Disodium 6-Hydroxy-5-(2-Methoxy-5-Methyl-4-Sulfonato-Phenyl)Diazenyl-Naphthalene-2-Sulfonate adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. The product undergoes rigorous analytical testing, including HPLC for assay and impurity profiling. Certificates of Analysis (COA) detailing purity, identity, and other critical parameters are provided with every shipment to support your quality assurance requirements.

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 prevent moisture absorption, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Reddish-brown to dark red powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm
Sulfated Ash	≤ 30.0%

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