2429-81-4 Usage
Preparation
4-(4-Aminophenyl)benzenamine double nitriding, first coupled with 2-Hydroxybenzoic acid, and then and 3-Amino-5-hydroxynaphthalene-2,7-disulfonic acid?diazo, in acid conditions and 4-Methylbenzene-1,3-diamine coupled to a product matches, then hydrolysis benzene sulfonic acid ester base, its products as coupling components again with diazo of 4-Aminonaphthalene-1-sulfonic acid?matches.
Properties and Applications
red light brown. Soluble in water for yellow brown, and adequate soluble in ethanol and soluble fiber element, insoluble in other organic solvents. The strong sulfuric acid for blue-ray purple or brown and violet black, yellow to red light brown after diluted precipitation; In the nitric acid for brown; In 10% of sodium hydroxide solution for blue-ray red. The dye solution to join strong hydrochloric acid for red orange brown; Add thick sodium hydroxide solution have orange brown precipitation.
Standard
Acid Resistance
Alkali Resistance
Light Fastness
Soaping
Water
Fading
Stain
Fading
Stain
ISO
3
3
2
2-3
3
AATCC
3-4
2
1-2
3-4
3
Standard
Acid Resistance
Fading
Stain
ISO
3
AATCC
3-4
Check Digit Verification of cas no
The CAS Registry Mumber 2429-81-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,4,2 and 9 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 2429-81:
(6*2)+(5*4)+(4*2)+(3*9)+(2*8)+(1*1)=84
84 % 10 = 4
So 2429-81-4 is a valid CAS Registry Number.