Description

1H-Pyrazole-3-carboxylic acid, 1-(2,5-disulfophenyl)-4-[5-[1-(2,5-disulfophenyl)-1,5-dihydro-3-(methoxycarbonyl)-5-oxo-4H-pyrazol-4-ylidene]-1,3-pentadienyl]-5-hydroxy-, 3-methyl ester, tetrapotassium salt is a high-purity, water-soluble dye intermediate characterized by its complex polycyclic structure and multiple sulfonate groups. This compound is valued for its strong chromophoric properties and ability to form stable, intense colors, making it a critical component in the synthesis of advanced functional dyes. It is primarily sought by manufacturers in the specialty chemicals sector for producing high-performance colorants for textiles, inks, and analytical reagents.

Application

• Reactive Dye Intermediate: A key precursor for synthesizing high-grade reactive dyes used in textile dyeing and printing, particularly for cotton and other cellulose fibers.
• Food Colorant Synthesis: Used in the controlled synthesis of certain synthetic food dyes, where its structure contributes to color stability and solubility.
• Inkjet Ink Formulation: Serves as a fundamental building block for creating pigments and dyes in high-quality inkjet inks, ensuring vivid color and print durability.
• Biological Staining Agent: Employed in the development of specialized stains and indicators for histological and cytological applications in life science research.
• Laser Dye & Optical Applications: Utilized in the research and production of dyes for tunable lasers and other optical media due to its specific light-absorption characteristics.
• Analytical Chemistry Reagent: Functions as a chromogenic agent or a standard in analytical methods such as spectrophotometry and chromatography.

Basic Information

Product Name	1H-Pyrazole-3-carboxylic acid, 1-(2,5-disulfophenyl)-4-[5-[1-(2,5-disulfophenyl)-1,5-dihydro-3-(methoxycarbonyl)-5-oxo-4H-pyrazol-4-ylidene]-1,3-pentadienyl]-5-hydroxy-, 3-methyl ester, tetrapotassium salt
CAS No.	155600-38-7
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Tetrapotassium 1-(2,5-disulfophenyl)-4-[5-[1-(2,5-disulfophenyl)-3-methoxycarbonyl-5-oxo-4H-pyrazol-4-ylidene]penta-1,3-dienyl]-5-hydroxy-3-methyl-1H-pyrazole-3-carboxylate; C.I. Reactive Yellow 176; Reactive Yellow 176; CAS 155600-38-7; 1H-Pyrazole-3-carboxylic acid, 1-(2,5-disulfophenyl)-4-[5-[1-(2,5-disulfophenyl)-1,5-dihydro-3-(methoxycarbonyl)-5-oxo-4H-pyrazol-4-ylidene]-1,3-pentadienyl]-5-hydroxy-, 3-methyl ester, potassium salt (1:4)
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management systems to ensure batch-to-batch consistency and purity. Each lot undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to meet the exacting standards of the specialty chemical industry. A detailed Certificate of Analysis (COA) documenting all relevant specifications is provided with every shipment to support your quality assurance and regulatory compliance needs.

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). This material is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark powder or solid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Sulfated Ash	Contact for details
Heavy Metals	≤ 20 ppm

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