6420-28-6 Usage
Uses
Used in Textile Industry:
Tetrasodium 3,3'-[carbonylbis[imino(2-methyl-4,1-phenylene)azo-4,1-phenylenecarbonylimino]]bis[5-sulphonatosalicylate] is used as a dye for cellulose fibers and silk, providing vibrant and long-lasting colors. Its light fastness and acid resistance make it suitable for various dyeing processes.
Used in Paper Industry:
In the paper industry, this dye is used for coloring paper, offering a wide range of shades and hues. Its alkali resistance and water fading properties ensure that the color remains stable and does not fade easily when exposed to water or alkaline conditions.
Standard:
The dye conforms to the ISO standard, with an acid resistance rating of 3, alkali resistance rating of 4, light fastness rating of 6, and water fading rating of 3-4. These ratings indicate the dye's performance and stability under various conditions, making it a reliable choice for different applications.
Preparation
2-Hydroxy-3-(4-aminobenzamido)-5-sulfobenzoic acid?diazo, and a coupling?m-Toluidine, then the light gasification.
Standard
Acid Resistance
Fading
Stain
ISO
3
Check Digit Verification of cas no
The CAS Registry Mumber 6420-28-6 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,4,2 and 0 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 6420-28:
(6*6)+(5*4)+(4*2)+(3*0)+(2*2)+(1*8)=76
76 % 10 = 6
So 6420-28-6 is a valid CAS Registry Number.
