Description

4-[(4-Amino-5-Methoxy-o-Tolyl)Azo]-5-[(Phenylsulphonyl)Oxy]Naphthalene-2,7-Disulphonic Acid, Sodium Salt is a high-purity, water-soluble azo dye intermediate characterized by its complex aromatic structure and multiple sulphonic acid groups. This compound is valued for its role in synthesizing specialized dyes and pigments that offer excellent color fastness and solubility properties. It is primarily required by manufacturers in the textile, ink, and specialty chemical industries for producing vibrant and stable colorants.

Application

• Primary Intermediate for Azo Dyes: A key building block in the synthesis of high-performance acid dyes and direct dyes for textiles, particularly for nylon, silk, and wool.
• Specialty Ink Formulations: Used in the production of colorants for inks requiring specific solubility and stability profiles, such as those for inkjet and packaging.
• Functional Dye Synthesis: Serves as a precursor for dyes used in biological staining, pH indicators, and other analytical applications.
• Pigment Manufacturing: Employed in the creation of lake pigments and other colorants where the sulphonate groups aid in dispersion and compatibility.
• Research & Development: Utilized in chemical research for developing new chromophores and studying azo coupling reactions.

Basic Information

Product Name	4-[(4-Amino-5-Methoxy-o-Tolyl)Azo]-5-[(Phenylsulphonyl)Oxy]Naphthalene-2,7-Disulphonic Acid, Sodium Salt
CAS No.	97158-52-6
Molecular Formula	C24H19N3O9S3Na2 or related sodium salt form
Molecular Weight	Contact for details
Synonyms	4-[(4-Amino-5-methoxy-2-methylphenyl)azo]-5-(phenylsulfonyloxy)naphthalene-2,7-disulfonic acid disodium salt; Acid Red Dye Intermediate 97158-52-6; C.I. Acid Red 337 intermediate; 5-[(Phenylsulfonyl)oxy]-4-[[4-amino-5-methoxy-2-methylphenyl]azo]-2,7-naphthalenedisulfonic acid, sodium salt; 97158-52-6; Azo dye intermediate for textiles; Naphthalenedisulfonic acid azo derivative
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed using advanced techniques like HPLC and spectrophotometry to confirm identity and assay. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications is provided with every shipment to support your quality assurance processes.

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 sealed to prevent absorption of atmospheric moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark red to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Water Content (KF)	Max. 5.0%
Solubility (1% in Water)	Complete, clear solution
Heavy Metals (as Pb)	Max. 20 ppm

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