Description

4-Hydroxy-3-[[4-[[2-(Sulfooxy)Ethyl]Sulfonyl]Phenyl]Azo]-2,7-Naphthalenedisulfonic Acid Tripotassium Salt is a high-purity, water-soluble anionic dye intermediate and reactive dye precursor. This compound is valued for its ability to impart vibrant color and excellent fastness properties when chemically bonded to substrates like cellulose fibers. It is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce high-performance, wash-fast dyes and pigments.

Application

• Reactive Dye Synthesis: Primary intermediate for manufacturing high-quality reactive dyes for cotton, viscose, and other cellulose-based textiles.
• Textile Printing and Dyeing: Used in formulations for inks and dye baths to achieve bright, durable colors with excellent wash and light fastness.
• Specialty Pigments: Serves as a key precursor for producing lake pigments and other colorants used in inks and coatings.
• Research & Development: A valuable chemical for R&D laboratories focusing on novel dye structures, color chemistry, and material science.
• Biomedical Staining: Potential use as a staining agent or tracer in specific histological or diagnostic applications due to its chromophoric properties.

Basic Information

Product Name	4-Hydroxy-3-[[4-[[2-(Sulfooxy)Ethyl]Sulfonyl]Phenyl]Azo]-2,7-Naphthalenedisulfonic Acid Tripotassium Salt
CAS No.	72187-37-2
Molecular Formula	C18H11K3N2O14S4
Molecular Weight	764.85 g/mol
Synonyms	Reactive Red 198; C.I. Reactive Red 198; Tripotassium 4-hydroxy-3-((4-((2-sulfooxyethyl)sulfonyl)phenyl)diazenyl)naphthalene-2,7-disulfonate; 72187-37-2; Reactive Red 198, tripotassium salt; 4-Hydroxy-3-((4-((2-sulfooxyethyl)sulfonyl)phenyl)azo)-2,7-naphthalenedisulfonic acid tripotassium salt; C.I. 18215
EINECS	Contact for details

Quality Control

Our production of 4-Hydroxy-3-[[4-[[2-(Sulfooxy)Ethyl]Sulfonyl]Phenyl]Azo]-2,7-Naphthalenedisulfonic Acid Tripotassium Salt adheres to stringent quality management systems. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and compliance with industry specifications. Certificates of Analysis (COA) detailing all relevant parameters are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at 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.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm

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