77031-30-2 Usage
Preparation
4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid?diazo, Coupled with resorcinol, its products and 2 Moore’s diazo ?4-Nitrobenzene-1,3-diamine coupling .
Properties and Applications
Dark brown. Apply to wool dyeing and leather color.
Check Digit Verification of cas no
The CAS Registry Mumber 77031-30-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,0,3 and 1 respectively; the second part has 2 digits, 3 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 77031-30:
(7*7)+(6*7)+(5*0)+(4*3)+(3*1)+(2*3)+(1*0)=112
112 % 10 = 2
So 77031-30-2 is a valid CAS Registry Number.