6227-19-6

Usage

Uses

Used in Dye Industry:
4-Hydroxy-3-[[5-methyl-2-methoxy-4-[(2-sodiosulfo-1-naphthalenyl)azo]phenyl]azo]-7-(phenylamino)naphthalene-2-sulfonic acid sodium salt is used as a dye in various applications due to its color-changing properties and solubility in different solvents. Its ability to produce a range of colors in response to pH changes makes it a versatile option for creating color effects in textiles, plastics, and other materials.
Used in Analytical Chemistry:
4-Hydroxy-3-[[5-methyl-2-methoxy-4-[(2-sodiosulfo-1-naphthalenyl)azo]phenyl]azo]-7-(phenylamino)naphthalene-2-sulfonic acid sodium salt can be employed as an analytical reagent in various chemical tests and assays. Its color-changing behavior in response to pH and the presence of different ions can be utilized to develop sensitive and selective methods for detecting and quantifying specific substances.
Used in Water Treatment:
4-Hydroxy-3-[[5-methyl-2-methoxy-4-[(2-sodiosulfo-1-naphthalenyl)azo]phenyl]azo]-7-(phenylamino)naphthalene-2-sulfonic acid sodium salt can be used in water treatment processes to monitor and adjust pH levels. Its color changes can serve as an indicator of the acidity or alkalinity of water, helping to ensure that the water is treated effectively and safely.
Standard:
4-Hydroxy-3-[[5-methyl-2-methoxy-4-[(2-sodiosulfo-1-naphthalenyl)azo]phenyl]azo]-7-(phenylamino)naphthalene-2-sulfonic acid sodium salt exhibits the following properties according to the ISO standards:
Acid Resistance: 2
Alkali Resistance: 4-5
Light Fastness: 4
Soaping: 1-2
Water: 1-2
These properties indicate that the compound has moderate resistance to acids and alkalis, good light fastness, and low fading and staining potential when exposed to water and soaping conditions.

Preparation

1-Amino-2-naphthalene sulfonic acid?diazo, and 2-Amino-4-methylanisole coupling, its product to diazo, in alkaline conditions and 4-Hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid coupling.

Standard

Acid Resistance

Fading

Stain

ISO

2