1327-69-1 Usage
Preparation
8-Amino-5-(4-hydroxyphenylamino)naphthalene-2-sulfonic acid and aqueous Sodium polysulfide heating, in 107 ~ 108 ℃ under reflux 2 4 hours, will be part of the precipitation in the Sodium sulfide of dye solution, blowing air redeposition. This indophenol?is from 8-Amino-5-nitronaphthalene-2-sulfonic acid and where did 5-Aminonaphthalene-2-sulfonic acid and where did 4-Aminophenol with Sodium hypochlorite oxidation of mixture, then use Sodium sulfide reduction and have to.
Properties and Applications
green light blue. Blue gray powder. Slightly soluble in water, not soluble in alcohol and benzene, soluble in Sodium sulfide solution for olive. In concentrated sulfuric acid for dark blue, dark blue precipitation after dilution. Dyeing content in alkaline insurance powder for dark yellow, after oxidation can restore the original colour and lustre; In Sodium hypochlorite solution all fade, join concentrated sulfuric acid into dark blue. Mainly used for cotton, hemp, viscose fiber dyeing and printing.
Standard
Acid Resistance
Alkali Resistance
Light Fastness
Fulling
Persperation Fastness
Soaping
Moderate
Severe
ISO
3-4
4
6
3-4
(Alkali)4-5
4
2
AATCC
5
4
5-6
3
3
Standard
Acid Resistance
Moderate
Severe
ISO
3-4
AATCC
5
Check Digit Verification of cas no
The CAS Registry Mumber 1327-69-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,3,2 and 7 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1327-69:
(6*1)+(5*3)+(4*2)+(3*7)+(2*6)+(1*9)=71
71 % 10 = 1
So 1327-69-1 is a valid CAS Registry Number.