Description

Disodium 4-[[2,4-Dihydroxy-5-[[3-Methyl-4-[(2-Methyl-5-Sulphonatophenyl)Azo]Phenyl]Azo]Phenyl]Azo]Naphthalene-1-Sulphonate is a high-purity, water-soluble azo dye intermediate known for its excellent chromophore properties and stability. This compound is critical for synthesizing vibrant and durable dyes and pigments, particularly in applications requiring specific shades of orange, red, and brown with good light and wash fastness. It is an essential raw material for manufacturers in the textile, leather, ink, and specialty coatings industries seeking consistent quality and performance in their colorant formulations.

Application

• Primary intermediate for the synthesis of acid dyes and direct dyes used in textile dyeing and printing.
• Manufacturing of pigments for industrial inks, including those for packaging and publication.
• Production of coloring agents for leather finishing and treatment processes.
• Key component in the formulation of specialty dyes for paper coloration.
• Used in the creation of functional colorants for plastics and polymers.
• Research and development of novel chromogenic materials in academic and industrial laboratories.

Basic Information

Item	Details
Product Name	Disodium 4-[[2,4-Dihydroxy-5-[[3-Methyl-4-[(2-Methyl-5-Sulphonatophenyl)Azo]Phenyl]Azo]Phenyl]Azo]Naphthalene-1-Sulphonate
CAS No.	85631-84-1
Molecular Formula	C30H22N6Na2O9S2
Molecular Weight	720.63 g/mol
Synonyms	Acid Orange 156; C.I. 26400; Disodium 4-[(2,4-dihydroxy-5-{[3-methyl-4-[(2-methyl-5-sulfonatophenyl)diazenyl]phenyl]diazenyl}phenyl)diazenyl]naphthalene-1-sulfonate; 4-[[2,4-Dihydroxy-5-[[3-Methyl-4-[(2-Methyl-5-Sulphonatophenyl)Azo]Phenyl]Azo]Phenyl]Azo]-1-Naphthalenesulfonic Acid Disodium Salt; C.I. Acid Orange 156; Azo dye intermediate 85631-84-1; Leather Orange Dye Intermediate
EINECS	Contact for details

Quality Control

Our production of Disodium 4-[[2,4-Dihydroxy-5-[[3-Methyl-4-[(2-Methyl-5-Sulphonatophenyl)Azo]Phenyl]Azo]Phenyl]Azo]Naphthalene-1-Sulphonate adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and chemical composition. Certificates of Analysis (COA) detailing key parameters such as assay, impurity profile, and solubility 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed when not in use to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
pH (1% Solution)	6.0 - 8.0

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