Description

Benzoic acid, 2-[[1-[4-[2-[4-[[4-[[4-[(3-carboxy-4-hydroxyphenyl)azo]phenyl]amino]-1,4-dioxo-2-butenyl]amino]-2-sulfophenyl]ethenyl]-3-sulfophenyl]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl]azo]-5-[(methylamino)sulfonyl]-, tetrasodium salt is a complex, water-soluble azo dye intermediate of significant industrial importance. Its multi-functional structure, featuring sulfonate and carboxylate groups, provides excellent solubility and binding properties for creating vibrant and stable colorants. This high-purity chemical is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to develop advanced, high-performance dyes and pigments.

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 in digital textile printing and high-resolution packaging.
• Functional Dye Synthesis: Serves as a precursor for dyes used in leather coloring, paper coloration, and other industrial applications.
• Research & Development: Employed in academic and industrial R&D labs for developing novel chromophores and studying structure-property relationships in dye chemistry.

Basic Information

Product Name	Benzoic acid, 2-[[1-[4-[2-[4-[[4-[[4-[(3-carboxy-4-hydroxyphenyl)azo]phenyl]amino]-1,4-dioxo-2-butenyl]amino]-2-sulfophenyl]ethenyl]-3-sulfophenyl]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl]azo]-5-[(methylamino)sulfonyl]-, tetrasodium salt
CAS No.	72139-20-9
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Reactive Red 198; Tetrasodium 5-[[4-[[4-[(3-carboxy-4-hydroxyphenyl)azo]phenyl]amino]-1,4-dioxo-2-butenyl]amino]-2-[[1-[4-[2-[4-[[4-[[4-[(3-carboxy-4-hydroxyphenyl)azo]phenyl]amino]-1,4-dioxo-2-butenyl]amino]-2-sulfophenyl]ethenyl]-3-sulfophenyl]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl]azo]benzenesulfonate; Reactive Red 198; Benzenesulfonic acid, 5-[[4-[[4-[(3-carboxy-4-hydroxyphenyl)azo]phenyl]amino]-1,4-dioxo-2-butenyl]amino]-2-[[1-[4-[2-[4-[[4-[[4-[(3-carboxy-4-hydroxyphenyl)azo]phenyl]amino]-1,4-dioxo-2-butenyl]amino]-2-sulfophenyl]ethenyl]-3-sulfophenyl]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl]azo]-, tetrasodium salt
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management systems to ensure batch-to-batch consistency and purity. Every lot undergoes comprehensive analytical testing, including HPLC for assay and impurity profiling and spectrophotometric analysis for color strength. A detailed Certificate of Analysis (COA) documenting identity, purity, and physical parameters is provided with each shipment to support your quality assurance protocols.

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 tightly sealed when not in use to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture (KF)	Max. 5.0%
Water Solubility	Completely soluble
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.