Description

4-Hydroxy-3-[[2-Methyl-4-[(2-Methylphenyl)Azo]Phenyl]Azo]Naphthalene-1,5-Disulfonic Acid Disodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its core value lies in its ability to impart vivid and stable color properties, making it a critical precursor in the synthesis of specialized dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking reliable and consistent colorant performance.

Application

This specialized azo compound serves as a key building block in the production of high-performance colorants. Its primary and related applications include:

• Primary Intermediate for Azo Dyes: Synthesis of acid dyes and direct dyes for textile fibers such as nylon, wool, and silk.
• Pigment Manufacturing: Used in the production of lake pigments and other colorants for industrial applications.
• Ink Formulation: A precursor for colorants used in specialty printing inks, including inks for packaging and security printing.
• Research & Development: Serves as a standard or reagent in chemical research focused on dye chemistry, photochemistry, and material science.
• Biological Staining: Potential use in the development of histological stains for microscopy, given its chromophoric structure.

Basic Information

Product Name	4-Hydroxy-3-[[2-Methyl-4-[(2-Methylphenyl)Azo]Phenyl]Azo]Naphthalene-1,5-Disulfonic Acid Disodium Salt
CAS No.	6470-58-2
Molecular Formula	C24H18N4Na2O7S2
Molecular Weight	584.53 g/mol
Synonyms	Acid Red 4; C.I. 14710; Disodium 4-hydroxy-3-((2-methyl-4-((2-methylphenyl)diazenyl)phenyl)diazenyl)naphthalene-1,5-disulfonate; 1,5-Naphthalenedisulfonic acid, 4-hydroxy-3-((2-methyl-4-((2-methylphenyl)azo)phenyl)azo)-, disodium salt; Azorubin S; Food Red 6; Carmoisine (related lake pigment); C.I. Acid Red 4
EINECS	229-290-0

Quality Control

Our production of 4-Hydroxy-3-[[2-Methyl-4-[(2-Methylphenyl)Azo]Phenyl]Azo]Naphthalene-1,5-Disulfonic Acid Disodium Salt adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing to ensure identity, purity, and consistency meet the high standards required for industrial synthesis. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical specifications is provided with each shipment to guarantee traceability and compliance.

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 incompatible materials such as strong oxidizing agents. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
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.