5858-93-5 Usage
Description
7-Hydroxy-8-[(4-sulfo-1-naphthalenyl)azo]-1-naphthalenesulfonic acid disodium salt is an organic compound that exhibits a red color when dissolved in water. It is also soluble in alcohol and displays a strong color change when exposed to strong sulfuric acid, turning from red to light purple. 7-Hydroxy-8-[(4-sulfo-1-naphthalenyl)azo]-1-naphthalenesulfonic acid disodium salt further changes color to red when strong hydrochloric acid is added to its aqueous solution, and turns yellow-brown upon the addition of a concentrated sodium hydroxide solution.
Uses
Used in Dye Industry:
7-Hydroxy-8-[(4-sulfo-1-naphthalenyl)azo]-1-naphthalenesulfonic acid disodium salt is used as a dye for its red color, which is soluble in water and alcohol. Its color-changing properties in the presence of different chemicals make it a versatile compound for creating various shades and hues in the dye industry.
Used in Textile Industry:
In the textile industry, 7-Hydroxy-8-[(4-sulfo-1-naphthalenyl)azo]-1-naphthalenesulfonic acid disodium salt is used as a colorant for fabrics. Its light fastness, soaping, perspiration fastness, and resistance to oxygen bleaching and seawater make it a suitable choice for染色 (dyeing) and printing on textiles.
7-Hydroxy-8-[(4-sulfo-1-naphthalenyl)azo]-1-naphthalenesulfonic acid disodium salt has been tested for its fastness properties according to ISO and AATCC standards, with the following results:
Light Fastness: ISO 3-4, AATCC 3
Soaping: ISO 2, AATCC 1
Perspiration Fastness: ISO 1, AATCC 1
Oxygen bleaching: ISO 2, AATCC 1
Fastness to seawater: Not specified
These properties indicate that the compound is suitable for use in various applications within the textile industry, where colorfastness is crucial for maintaining the appearance and quality of the final product.
Preparation
4-Aminonaphthalene-1-sulfonic acid diazo, and 7-Hydroxynaphthalene-1-sulfonic acid?coupling.
Standard
Light Fastness
Fading
Stain
ISO
3-4
AATCC
3
Check Digit Verification of cas no
The CAS Registry Mumber 5858-93-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,8,5 and 8 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 5858-93:
(6*5)+(5*8)+(4*5)+(3*8)+(2*9)+(1*3)=135
135 % 10 = 5
So 5858-93-5 is a valid CAS Registry Number.
InChI:InChI=1/C20H14N2O7S2.2Na/c23-16-10-8-12-4-3-7-18(31(27,28)29)19(12)20(16)22-21-15-9-11-17(30(24,25)26)14-6-2-1-5-13(14)15;;/h1-11,21H,(H,24,25,26)(H,27,28,29);;/q;2*+1/p-2/b22-20+;;
