Description

4-[(4-Amino-5-Methoxy-o-Tolyl)Azo]-5-[[(p-Tolyl)Sulphonyl]Oxy]Naphthalene-2,7-Disulphonic Acid, Sodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its complex molecular structure, featuring azo, sulphonic acid, and sulphonyloxy groups, makes it a critical precursor for synthesizing specialized dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce vibrant, color-fast products with specific performance characteristics.

Application

• Primary Intermediate for Azo Dyes: A key building block in the synthesis of high-performance, water-soluble azo dyes for textile fibers, particularly polyamide and protein fibers like wool and silk.
• Specialty Ink Formulation: Used in the production of colorants for inks requiring specific solubility, stability, and hue, including certain jet printing and packaging inks.
• Functional Dye Synthesis: Serves as a precursor for dyes with specialized applications, such as those used in biological staining, pH indicators, or light-absorbing materials.
• Research & Development: Employed in chemical R&D for developing novel chromophores and studying structure-property relationships in dye chemistry.
• Pigment Manufacturing: Can be used in the synthesis of certain lake pigments after metallization or precipitation processes.

Basic Information

Product Name	4-[(4-Amino-5-Methoxy-o-Tolyl)Azo]-5-[[(p-Tolyl)Sulphonyl]Oxy]Naphthalene-2,7-Disulphonic Acid, Sodium Salt
CAS No.	85135-92-8
Molecular Formula	C25H21N3O9S3Na2 or C25H23N3O9S3Na2 (hydrate form)
Molecular Weight	Approx. 665.6 g/mol (anhydrous)
Synonyms	5-[[(4-Methylphenyl)sulfonyl]oxy]-4-[(4-amino-5-methoxy-2-methylphenyl)azo]-2,7-naphthalenedisulfonic acid disodium salt; C.I. Azoic Diazo Component 114; Azoic Diazo 114; Fast Scarlet TR Base; 4-Amino-5-methoxy-o-toluidine -> 5-[[(p-tolyl)sulphonyl]oxy]-2,7-naphthalenedisulphonic acid azo dye; Disodium 4-[(4-amino-5-methoxy-2-methylphenyl)azo]-5-[(4-methylphenyl)sulfonyloxy]naphthalene-2,7-disulfonate
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and purity. The manufacturing process is monitored against established in-house specifications, which typically include parameters for identity, assay, impurity profile, and solubility. A Certificate of Analysis (COA) detailing the results of these analytical tests (including HPLC, IR, and titration methods) is provided with each shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled 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 quality and handling properties. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark red to brown powder or crystalline solid
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0% (on anhydrous basis)
Water Content (KF)	≤ 5.0%
Solubility (1% in Water)	Complete, clear solution
Heavy Metals (as Pb)	≤ 20 ppm

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