Description

3-Amino-4-[[4-[[2-(Sulphooxy)Ethyl]Sulphonyl]Phenyl]Azo]Naphthalene-2,7-Disulphonic Acid, Sodium Salt is a high-purity, water-soluble anionic azo dye intermediate of significant industrial importance. Its core value lies in its ability to impart vibrant and stable color properties, making it a critical precursor for the synthesis of specialized dyes and pigments. This compound is primarily needed by manufacturers in the textile, ink, and specialty chemical industries seeking to produce high-performance colorants with excellent fastness and solubility characteristics.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-quality reactive dyes for cotton, wool, and nylon fibers.
• Specialty Ink Formulations: Used in the production of pigments for inks requiring specific solubility and color strength, such as in jet printing inks.
• Functional Dye Synthesis: Serves as a precursor for dyes used in biological staining, pH indicators, and other analytical applications.
• Leather and Paper Dyeing: Employed in the manufacture of dyes for coloring leather and specialty papers.
• Research & Development: Utilized in chemical R&D for creating novel chromophores and studying azo dye chemistry.

Basic Information

Product Name	3-Amino-4-[[4-[[2-(Sulphooxy)Ethyl]Sulphonyl]Phenyl]Azo]Naphthalene-2,7-Disulphonic Acid, Sodium Salt
CAS No.	85536-91-0
Molecular Formula	C24H19N4Na3O13S4
Molecular Weight	794.66 g/mol (as Sodium Salt)
Synonyms	Reactive Red 198 Intermediate; 3-Amino-4-((4-((2-sulfooxyethyl)sulfonyl)phenyl)azo)naphthalene-2,7-disulfonic acid trisodium salt; C.I. Reactive Red 198 precursor; Acid Red 359 related compound; Azo dye intermediate 85536-91-0; Trisodium 3-amino-4-[[4-[(2-sulfonatooxyethyl)sulfonyl]phenyl]diazenyl]naphthalene-2,7-disulfonate; 2,7-Naphthalenedisulfonic acid, 3-amino-4-[[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-, sodium salt (1:3)
EINECS	Contact for details

Quality Control

Our production of 3-Amino-4-[[4-[[2-(Sulphooxy)Ethyl]Sulphonyl]Phenyl]Azo]Naphthalene-2,7-Disulphonic Acid, Sodium Salt adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and compliance with customer specifications. Certificates of Analysis (COA) detailing purity, impurity profile, and physical characteristics are provided with each shipment.

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)	≥ 95.0% (Area %)
Water Content	≤ 5.0% (Karl Fischer)
Solubility (in Water)	Clear solution at 1% w/v
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 1.0%; Total impurities ≤ 3.0%

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