Description

4-Hydroxy-7-[[[[5-Hydroxy-6-[(2-Methoxyphenyl)Azo]-7-Sulpho-2-Naphthyl]Amino]Carbonyl]Amino]-3-[(6-Sulpho-2-Naphthyl)Azo]Naphthalene-2-Sulphonic Acid, Sodium Salt is a high-purity, complex azo dye intermediate essential for producing vivid and stable colorants. This compound matters for its role in synthesizing specialized dyes with excellent light and wash fastness properties, meeting stringent industrial quality demands. It is primarily needed by manufacturers in the textile, ink, and specialty chemical sectors seeking reliable and consistent raw materials for high-performance dye production.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-quality reactive dyes used for coloring cotton, wool, and nylon fibers.
• Specialty Ink Formulations: Used in the production of pigments for inks requiring specific color shades and stability, including for packaging and security printing.
• Functional Dye Synthesis: Serves as a precursor for dyes used in non-textile applications such as lasers, optical data storage, and liquid crystal displays (LCDs).
• Research & Development: Employed in chemical R&D laboratories for developing novel chromophores and studying azo dye chemistry and properties.
• Leather and Paper Dyeing: Utilized in the manufacture of dyes for coloring leather and specialty papers where color depth and fastness are critical.

Basic Information

Product Name	4-Hydroxy-7-[[[[5-Hydroxy-6-[(2-Methoxyphenyl)Azo]-7-Sulpho-2-Naphthyl]Amino]Carbonyl]Amino]-3-[(6-Sulpho-2-Naphthyl)Azo]Naphthalene-2-Sulphonic Acid, Sodium Salt
CAS No.	83763-84-2
Molecular Formula	C39H26N6O13S3Na2 (or similar, based on structure)
Molecular Weight	Contact for details
Synonyms	C.I. Reactive Red 198 (principal synonym); Reactive Red 198; Sodium 4-hydroxy-7-({[(5-hydroxy-6-[(2-methoxyphenyl)diazenyl]-7-sulphonato-2-naphthyl)carbamoyl]amino})-3-[(6-sulphonato-2-naphthyl)diazenyl]naphthalene-2-sulphonate; 7-[[[[5-Hydroxy-6-[(2-Methoxyphenyl)Azo]-7-Sulfo-2-Naphthalenyl]Amino]Carbonyl]Amino]-4-Hydroxy-3-[(6-Sulfo-2-Naphthalenyl)Azo]-2-Naphthalenesulfonic Acid Disodium Salt; Azo Dye Intermediate RR-198; CAS 83763-84-2
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to rigorous quality control protocols to ensure batch-to-batch consistency and purity for industrial synthesis. Quality is verified through advanced analytical techniques including HPLC, UV-Vis spectroscopy, and titration methods. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee compliance with your specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and 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 to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Dark red to brown powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	Max. 20 ppm
Solubility (in Water)	Freely soluble

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