Description

Disodium 2-[[5-carbamoyl-1-ethyl-1,6-dihydro-2-hydroxy-4-methyl-6-oxo-3-pyridyl]azo]-4-[[4-[(2-chloro-5-sulphonatophenyl)amino]-6-fluoro-1,3,5-triazin-2-yl]amino]benzenesulphonate is a high-performance, water-soluble reactive dye intermediate of significant commercial importance. Its complex molecular structure, featuring a pyridone azo component linked to a fluorotriazine reactive group, is engineered to deliver superior color fastness and covalent bonding with cellulosic fibers. This compound is essential for manufacturers requiring vibrant, wash-resistant shades in textiles and advanced colorants. The CAS number for this compound is 75268-65-4.

Application

This specialized reactive dye intermediate is designed for high-value applications where color performance and durability are paramount.

• Primary application in the synthesis of high-grade reactive dyes for the textile industry, particularly for cotton, viscose, and other cellulosic fibers.
• Used in the production of dyes for exhaust dyeing and continuous dyeing processes, ensuring deep and uniform penetration.
• Suitable for creating bright red to bluish-red shades with excellent wet fastness properties, including wash, perspiration, and light fastness.
• Potential use in the coloration of leather and paper where reactive dye technology is applied.
• Acts as a key intermediate for research and development of next-generation colorants with enhanced environmental or performance profiles.

Basic Information

Item	Detail
Product Name	Disodium 2-[[5-carbamoyl-1-ethyl-1,6-dihydro-2-hydroxy-4-methyl-6-oxo-3-pyridyl]azo]-4-[[4-[(2-chloro-5-sulphonatophenyl)amino]-6-fluoro-1,3,5-triazin-2-yl]amino]benzenesulphonate
CAS No.	75268-65-4
Molecular Formula	C25H19ClF1N9Na2O10S2
Molecular Weight	~ 785.04 g/mol (Disodium salt form)
Synonyms	Reactive Red 198 (C.I. Name); C.I. Reactive Red 198; Disodium 5-[(4,6-difluoro-1,3,5-triazin-2-yl)amino]-4-hydroxy-3-[[1-ethyl-4-methyl-2,6-dioxo-5-(aminocarbonyl)-1,2,3,6-tetrahydro-5-pyridinyl]azo]-2,7-naphthalenedisulfonate (alternative representation); Reactive Red F3B; RR 198; DyStar Levafix Red CA; Azo Pyridone Reactive Dye Intermediate; 2,7-Naphthalenedisulfonic acid, 5-[(4,6-difluoro-1,3,5-triazin-2-yl)amino]-4-hydroxy-3-[[1-ethyl-4-methyl-2,6-dioxo-5-(aminocarbonyl)-3,6-dihydro-1(2H)-pyridinyl]azo]-, sodium salt (1:2)
EINECS	Contact for details

Quality Control

Our production of this reactive dye intermediate adheres to strict quality management systems to ensure batch-to-batch consistency and performance reliability. Quality is verified through comprehensive analytical testing, including HPLC for purity and assay, spectrophotometry for color strength, and stringent impurity profiling. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting key parameters such as purity, reactive group content, and solubility. We support compliance with global supply chain requirements.

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 after opening to prevent moisture absorption, which can affect performance. Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Reddish-brown to dark red powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	Max. 5.0%
Water Solubility	Conforms
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	Max. 20 ppm

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