8003-87-0 Usage
Description
Disodium 5,5'-[thiobis(phenyleneazo)]disalicylate is an organic compound that exhibits color changes when exposed to different chemicals and conditions. It is characterized by its dark red color in its solid state, which turns light yellow under green light. It is soluble in water, slightly soluble in Cellosolve, and almost insoluble in Ethanol and Acetone. In concentrated sulfuric acid, it forms a dark red sauce, which turns light yellow upon dilution. In concentrated nitric acid, it appears olive green. When its dye aqueous solution is mixed with concentrated hydrochloric acid, it turns light yellow, and when mixed with concentrated sodium hydroxide solution, it becomes golden orange.
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
Check Digit Verification of cas no
The CAS Registry Mumber 8003-87-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 8,0,0 and 3 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 8003-87:
(6*8)+(5*0)+(4*0)+(3*3)+(2*8)+(1*7)=80
80 % 10 = 0
So 8003-87-0 is a valid CAS Registry Number.
