Description

4-[[4-[[2-(Diethylamino)Ethyl]Sulphonyl]-2,5-Dimethoxyphenyl]Azo]-4,5-Dihydro-5-Oxo-1-(4-Sulphophenyl)-1H-Pyrazole-3-Carboxylic Acid, Sodium Salt is a high-purity, water-soluble anionic dye intermediate with a complex azo-pyrazolone structure. This compound is valued for its ability to impart vibrant and stable color properties in advanced applications, making it a critical component for manufacturers requiring precise and reliable chromophores. It is primarily sought by producers in the specialty dyes and pigments industry for creating high-performance colorants.

Application

This specialized chemical intermediate serves as a key building block in the synthesis of advanced colorants. Its primary and related applications include:

• Reactive Dye Synthesis: As a core chromophore component for producing reactive dyes used in textile dyeing and printing.
• Acid Dye Manufacturing: For the production of acid dyes applied to nylon, silk, wool, and leather.
• Food, Drug, and Cosmetic (FD&C) Colorants: Potential use in the synthesis of certified color additives, subject to stringent regulatory compliance and purity grades.
• Inkjet Ink Formulations: Providing color for high-performance inks used in digital and industrial printing.
• Biological Staining: Application in histological stains and indicators for laboratory and diagnostic use.
• Functional Dyes: Research and development of dyes for non-textile uses, including sensors and optical materials.

Basic Information

Product Name	4-[[4-[[2-(Diethylamino)Ethyl]Sulphonyl]-2,5-Dimethoxyphenyl]Azo]-4,5-Dihydro-5-Oxo-1-(4-Sulphophenyl)-1H-Pyrazole-3-Carboxylic Acid, Sodium Salt
CAS No.	94249-20-4
Molecular Formula	C24H27N5O10S2Na
Molecular Weight	640.62 g/mol
Synonyms	Sodium 4-[[4-[[2-(diethylamino)ethyl]sulfonyl]-2,5-dimethoxyphenyl]azo]-4,5-dihydro-5-oxo-1-(4-sulfophenyl)-1H-pyrazole-3-carboxylate; C.I. Acid Yellow 220; Acid Yellow 220, Sodium Salt; 4,5-Dihydro-5-oxo-1-(4-sulfophenyl)-4-[(4-[(2-(diethylamino)ethyl)sulfonyl]-2,5-dimethoxyphenyl)azo]-1H-pyrazole-3-carboxylic acid sodium salt; Azo Pyrazolone Dye Intermediate; Reactive Yellow Dye Intermediate; FD&C Yellow No. 6 Lake Intermediate (related chemistry); Sulphonated Azo Dye
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. Quality is verified through comprehensive analytical testing, including HPLC for purity, spectrophotometry for color strength, and tests for residual solvents and heavy metals. A Certificate of Analysis (COA) detailing all specifications is provided with each shipment. We support compliance with relevant global standards, including REACH and guidelines for products intended for sensitive applications.

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 to prevent absorption of atmospheric moisture, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Yellow to Orange Powder
Identification (IR)	Conforms to Standard
Assay (HPLC)	≥ 95.0%
Color Strength	98 - 102% (vs. Standard)
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residual Solvents (GC)	Meets ICH Guidelines

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