2475-31-2 Usage
Description
Vat Blue 4B is a blue-colored dye used in various applications, including dyeing cotton, viscose, silk, and wool. It is a dark blue powder that is insoluble in water but soluble in xylene, nitrobenzene, and tetrahydronaphthalene. It can be reduced with alkaline or acid to produce different shades of yellow.
Uses
Used in Textile Industry:
Vat Blue 4B is used as a dye for cotton, viscose, silk, and wool. It provides good levelness and affinity, making it suitable for jig dyeing and yarn dyeing. It can produce turquoise blue colors on blue cloth.
Used in Printing Industry:
Vat Blue 4B is an important dye for printing. It can be used for direct printing, discharge printing, and resist printing.
Standard:
Vat Blue 4B has the following ratings for various standards:
Ironing Fastness: ISO 5, AATCC 5
Chlorine bleach: ISO 2, AATCC 2
Light Fastness: ISO 4-5, AATCC 4-5
Mercerized: ISO 4, AATCC 3-4
Oxygen bleach: ISO 4, AATCC 4
Soaping: ISO 4-5, AATCC 4-5
Fading: ISO 5, AATCC 5
Stain: ISO 5, AATCC 5
Preparation
(a) and Acetic anhydride in the presence of Sodium acetate trihydrate in Acetic acid glacial will 3H-indol-3-one,2-(1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro-? ?tetrabromide?(FIAT764); (b) in the boiling Nitrobenzene with Bromine will 3H-indol-3-one,2-(1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro- four bromination, (C) 3H-indol-3-one,2-(1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro- in Chlorosulfonic acid (GP 225227) or in Sulfuryl chloride (GP 229304) and bromine reaction.
Standard
Ironing Fastness
Fading
Stain
ISO
5
AATCC
5
Check Digit Verification of cas no
The CAS Registry Mumber 2475-31-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,4,7 and 5 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 2475-31:
(6*2)+(5*4)+(4*7)+(3*5)+(2*3)+(1*1)=82
82 % 10 = 2
So 2475-31-2 is a valid CAS Registry Number.
InChI:InChI=1/C16H6Br4N2O2/c17-5-1-7-11(9(19)3-5)21-13(15(7)23)14-16(24)8-2-6(18)4-10(20)12(8)22-14/h1-4,21-22H/b14-13-
