8003-87-0

Usage

Uses

Used in Textile Industry:
Disodium 5,5'-[thiobis(phenyleneazo)]disalicylate is used as a dye in the textile industry for its color-changing properties. Its ability to change color under different conditions makes it suitable for creating unique and dynamic patterns on fabrics.
Used in Analytical Chemistry:
Disodium 5,5'-[thiobis(phenyleneazo)]disalicylate can be used as an indicator in analytical chemistry due to its color-changing properties. It can help in determining the presence or concentration of certain chemicals by observing the color changes it undergoes when exposed to them.
Used in pH Indicators:
Due to its color changes in the presence of acids and bases, disodium 5,5'-[thiobis(phenyleneazo)]disalicylate can be used as a pH indicator in various applications, such as in educational settings or research laboratories, to visually monitor pH levels.
Used in Dye Synthesis:
Disodium 5,5'-[thiobis(phenyleneazo)]disalicylate can be used as a starting material or intermediate in the synthesis of other dyes and pigments, particularly those with color-changing properties.
Standard:
The standard for disodium 5,5'-[thiobis(phenyleneazo)]disalicylate includes various tests such as Ironing Fastness, Light Fastness, Fulling, Perspiration Fastness, Soaping, Water, Alkali, and Acid resistance. The ratings for these tests are based on ISO and AATCC standards, with ratings ranging from 2-3 for Fulling to 5 for Acid resistance.

Preparation

4-(4-Aminophenylthio)benzenamine and 4-(2-Aminophenylthio)benzenamine diazotization, and 2-Hydroxybenzoic acid?(2 Moore) coupling.

Standard

Ironing Fastness

Alkali

Acid

ISO

4-5

AATCC

3