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Usage

Uses

Used in Textile Industry:
4-[4,5-Dihydro-3-methyl-4-[(4-methylphenyl)azo]-5-oxo-1H-pyrazol-1-yl]benzenesulfonic acid sodium salt is used as a dyeing agent for wool, silk, and vinegar fiber. Its strong affinity for these materials allows for the creation of vibrant and long-lasting colors.
Used in Cotton Dyeing:
In the cotton dyeing process, 4-[4,5-Dihydro-3-methyl-4-[(4-methylphenyl)azo]-5-oxo-1H-pyrazol-1-yl]benzenesulfonic acid sodium salt is used to achieve a range of yellow shades. Its ability to bind effectively with cotton fibers ensures colorfastness and resistance to fading.
Used in Rubber and Synthetic Resin Coloring:
The aluminum salt of 4-[4,5-Dihydro-3-methyl-4-[(4-methylphenyl)azo]-5-oxo-1H-pyrazol-1-yl]benzenesulfonic acid sodium salt is utilized in the coloring of rubber and synthetic resins. This application takes advantage of the compound's stability and color retention properties, providing durable and consistent coloration for these materials.
Standard:
4-[4,5-Dihydro-3-methyl-4-[(4-methylphenyl)azo]-5-oxo-1H-pyrazol-1-yl]benzenesulfonic acid sodium salt adheres to various industry standards, ensuring its performance and reliability in different applications. It demonstrates the following ratings for different fastness properties:
Light Fastness: ISO 5
Soaping: 2-3
Perspiration Fastness: 2-3
Oxygen Bleaching: 4
Fastness to Seawater: 2-3
These ratings indicate the compound's resistance to fading, staining, and other forms of color degradation under various conditions, making it a reliable choice for a wide range of dyeing and coloring applications.

Preparation

p-Methylaniline diazo, and 4-(3-Methyl-5-oxo-4,5-dihydropyrazol-1-yl)benzenesulfonic acid coupling.

Standard

Light Fastness

Fading

Stain

ISO

5