6420-38-8

Usage

Uses

Used in Dye Industry:
Disodium 7,7'-iminobis[3-[(2,4-dimethylphenyl)azo]-4-hydroxynaphthalene-2-sulphonate] is used as a dye for its color-changing properties in response to different chemical environments. Its ability to produce various shades of red and purple makes it a valuable component in the formulation of dyes for textiles, plastics, and other materials.
Used in Analytical Chemistry:
Due to its sensitivity to changes in pH and the presence of specific ions, disodium 7,7'-iminobis[3-[(2,4-dimethylphenyl)azo]-4-hydroxynaphthalene-2-sulphonate] can be employed as an indicator or reagent in analytical chemistry for detecting and measuring the concentration of various substances.
Used in pH Indicators:
disodium 7,7'-iminobis[3-[(2,4-dimethylphenyl)azo]-4-hydroxynaphthalene-2-sulphonate]'s color-changing behavior in response to acidic and alkaline conditions makes it suitable for use as a pH indicator in both laboratory and industrial settings.
Standard:
disodium 7,7'-iminobis[3-[(2,4-dimethylphenyl)azo]-4-hydroxynaphthalene-2-sulphonate] has been tested for its resistance to various conditions, such as acid and alkali resistance, light fastness, soaping, water fading, and stain fading. The results are as follows:
Acid Resistance: ISO 3, AATCC 3
Alkali Resistance: ISO 3, AATCC 4
Light Fastness: ISO 2, AATCC 2
Soaping: ISO 2-3, AATCC 2
Water Fading: ISO 2-3, AATCC 2
Stain Fading: ISO 2, AATCC 3
These standards indicate the compound's performance under different conditions, making it a versatile and valuable material for various applications in the dye, analytical chemistry, and pH indicator industries.

Preparation

2,4-Dimethylbenzenamine (2 Moore) diazo, and Bis(4-hydroxy-2-sulfonaphthalene-7-yl)amine coupling (2,4-Dimethylbenzenamine can part with heterogeneous, or other aromatic amine replace).

Standard

Acid Resistance

Fading

Stain

ISO

3

AATCC

3