5858-42-4 Usage
Description
Naphthalene Scarlet B is a synthetic azo dye characterized by its red color. It is soluble in water, exhibiting a yellow light red hue. When treated with strong sulfuric acid, the product turns red, and upon dilution, it forms a scarlet solution that eventually precipitates as yellow brown. The addition of hydrochloric acid to its aqueous solution results in a yellow brown precipitate, while the addition of sodium hydroxide solution does not cause any color change.
Uses
Used in Textile Industry:
Naphthalene Scarlet B is used as a colorant for various textile applications due to its light fastness, soaping fastness, perspiration fastness, and oxygen bleaching fastness. Its ability to resist fading and staining makes it a suitable choice for coloring fabrics.
Used in Dye Industry:
In the dye industry, Naphthalene Scarlet B is utilized as a red dye for various applications, including coloring fabrics, plastics, and other materials. Its fastness properties, such as resistance to seawater and fading, make it a preferred choice for creating long-lasting and vibrant colors.
Standard:
The fastness properties of Naphthalene Scarlet B are measured according to the ISO standard, with the following ratings:
Light Fastness: 3
Soaping Fastness: 3
Perspiration Fastness: 4-5
Oxygen Bleaching: 4
Fastness to Seawater: 1
Fading: 3-4
Stain: 3
These ratings indicate the dye's performance in various conditions, making it a reliable choice for different applications in the textile and dye industries.
Preparation
6-Aminonaphthalene-2-sulfonic acid diazo, coupled with the 4-Hydroxynaphthalene-1-sulfonic acid.
Standard
Light Fastness
Fading
Stain
ISO
3
Check Digit Verification of cas no
The CAS Registry Mumber 5858-42-4 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, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 5858-42:
(6*5)+(5*8)+(4*5)+(3*8)+(2*4)+(1*2)=124
124 % 10 = 4
So 5858-42-4 is a valid CAS Registry Number.
InChI:InChI=1/C20H14N2O7S2.2Na/c23-20-17-4-2-1-3-16(17)19(31(27,28)29)11-18(20)22-21-14-7-5-13-10-15(30(24,25)26)8-6-12(13)9-14;;/h1-11,21H,(H,24,25,26)(H,27,28,29);;/q;2*+1/p-2/b22-18+;;
