Description

Disodium 5-[[4-[[4-[(2,8-Dihydroxy-6-Sulphonatonaphthyl)Azo]-o-Tolyl]Methyl]Phenyl]Azo]-4,6-Dihydroxynaphthalene-2-Sulphonate is a high-purity, synthetic azo dye intermediate of significant industrial importance. Its complex molecular structure, featuring multiple azo linkages and sulphonate groups, makes it a critical precursor for producing vivid and stable colorants. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to develop high-performance dyes and pigments. Consistent quality and reliable supply are paramount for ensuring batch-to-batch color consistency in final applications.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-quality reactive dyes for cotton, wool, and nylon fibers.
• Textile Colorant Production: Used in manufacturing dyes that offer excellent wash-fastness and light-fastness for the textile industry.
• Specialty Ink Formulations: Serves as a precursor for pigments used in high-performance inks for packaging and commercial printing.
• Industrial Pigment Synthesis: Employed in creating organic pigments for plastics, paints, and coatings requiring specific color properties.
• Research & Development: Utilized in chemical R&D for developing novel chromophores and studying azo dye chemistry.
• Laboratory Reagent: Acts as a standard or reagent in analytical and quality control laboratories within the colorant industry.

Basic Information

Product Name	Disodium 5-[[4-[[4-[(2,8-Dihydroxy-6-Sulphonatonaphthyl)Azo]-o-Tolyl]Methyl]Phenyl]Azo]-4,6-Dihydroxynaphthalene-2-Sulphonate
CAS No.	73513-98-1
Molecular Formula	C40H26N4Na2O12S2
Molecular Weight	856.81 g/mol
Synonyms	Disodium 5-[[4-[[4-[(2,8-dihydroxy-6-sulfo-1-naphthyl)azo]-2-methylphenyl]methyl]phenyl]azo]-4,6-dihydroxy-2-naphthalenesulfonate; C.I. Reactive Red 198; Reactive Red 198; Disodium 5-[[4-[[4-[(2,8-dihydroxy-6-sulfonaphthyl)azo]-o-tolyl]methyl]phenyl]azo]-4,6-dihydroxynaphthalene-2-sulfonate; 73513-98-1; Azo dye intermediate RR198; Precursor for C.I. Reactive Red 198
EINECS	Contact for details

Quality Control

Our production of Disodium 5-[[4-[[4-[(2,8-Dihydroxy-6-Sulphonatonaphthyl)Azo]-o-Tolyl]Methyl]Phenyl]Azo]-4,6-Dihydroxynaphthalene-2-Sulphonate adheres to stringent quality management protocols to ensure it meets the exacting standards of the dye and pigment industry. Every batch undergoes comprehensive analytical testing, including HPLC for purity and isomer content, spectrophotometric analysis for color strength, and verification of key physical parameters. A detailed Certificate of Analysis (COA) documenting these results is provided with each shipment to guarantee traceability and consistency for your manufacturing processes.

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 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
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 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.